Release 💎 4.2.1

Backport #8620 for v4.2.x: Revert #7253: "Don't reset site.url to localhost:4000 by default"

.codeclimate.yml

@@ -1,36 +1,53 @@
-engines:
+version: "2"
+checks:
+  argument-count:
+    enabled: true
+    config:
+      threshold: 5
+  file-lines:
+    enabled: true
+    config:
+      threshold: 300
+  method-complexity:
+    enabled: true
+    config:
+      threshold: 15
+  method-count:
+    enabled: true
+    config:
+      threshold: 50
+  method-lines:
+    enabled: true
+    config:
+      threshold: 30
+plugins:
   fixme:
     enabled: false
   rubocop:
     enabled: true
-    channel: rubocop-0-54
+    channel: rubocop-0-60
 
-exclude_paths:
-  - .codeclimate.yml
-  - .gitignore
-  - .rspec
-  - .rubocop.yml
-  - .travis.yml
+exclude_patterns:
+  - "*.*"
+  - ".*"
 
-  - Gemfile.lock
-  - CHANGELOG.{md,markdown,txt,textile}
-  - CONTRIBUTING.{md,markdown,txt,textile}
-  - readme.{md,markdown,txt,textile}
-  - README.{md,markdown,txt,textile}
-  - Readme.{md,markdown,txt,textile}
-  - ReadMe.{md,markdown,txt,textile}
-  - COPYING
+  - Gemfile
   - LICENSE
+  - Rakefile
 
-  - features/**/*
-  - script/**/*
-  - docs/**/*
-  - spec/**/*
-  - test/**/*
-  - vendor/**/*
+  - benchmark/
+  - docs/
+  - exe/
+  - features/
+  - rake/
+  - rubocop/
+  - script/
+  - spec/
+  - test/
+  - vendor/
 
+  - lib/blank_template/
+  - lib/site_template/
+  - lib/theme_template/
+  - lib/jekyll/mime.types
   - lib/jekyll/commands/serve/livereload_assets/livereload.js
-
-ratings:
-  paths:
-    - lib/**/*.rb

.devcontainer/Dockerfile

@@ -0,0 +1,55 @@
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM ruby:2
+
+# Avoid warnings by switching to noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
+
+# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
+# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
+# will be updated to match your local UID/GID (when using the dockerFile property).
+# See https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt and install packages
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils dialog locales 2>&1 \
+    # Verify git, process tools installed
+    && apt-get -y install git openssh-client iproute2 procps lsb-release \
+    #
+    # Install ruby-debug-ide and debase
+    && gem install ruby-debug-ide \
+    && gem install debase \
+    #
+    # Install node.js
+    && apt-get -y install curl software-properties-common \
+    && curl -sL https://deb.nodesource.com/setup_13.x | bash - \
+    && apt-get -y install nodejs \
+    #
+    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support for the non-root user
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME\
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set the locale
+RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
+    dpkg-reconfigure --frontend=noninteractive locales && \
+    update-locale LANG=en_US.UTF-8
+
+ENV LANG en_US.UTF-8
+
+# Switch back to dialog for any ad-hoc use of apt-get
+ENV DEBIAN_FRONTEND=dialog

.devcontainer/devcontainer.json

@@ -0,0 +1,26 @@
+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.101.1/containers/ruby-2
+{
+	"name": "Ruby 2",
+	"dockerFile": "Dockerfile",
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": { 
+		"terminal.integrated.shell.linux": "/bin/bash"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"rebornix.Ruby"
+	]
+	
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "bundle install",
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+
+}

.gitattributes

@@ -0,0 +1 @@
+* text=auto

.github/CONTRIBUTING.markdown

@@ -4,30 +4,30 @@ Hi there! Interested in contributing to Jekyll? We'd love your help. Jekyll is a
 
 ## Where to get help or report a problem
 
-See [the support guidelines](https://jekyllrb.com/docs/support/)
+See the [support guidelines](https://jekyllrb.com/docs/support/)
 
 ## Ways to contribute
 
 Whether you're a developer, a designer, or just a Jekyll devotee, there are lots of ways to contribute. Here's a few ideas:
 
-* [Install Jekyll on your computer](https://jekyllrb.com/docs/installation/) and kick the tires. Does it work? Does it do what you'd expect? If not, [open an issue](https://github.com/jekyll/jekyll/issues/new) and let us know.
-* Comment on some of the project's [open issues](https://github.com/jekyll/jekyll/issues). Have you experienced the same problem? Know a work around? Do you have a suggestion for how the feature could be better?
-* Read through [the documentation](https://jekyllrb.com/docs/home/), and click the "improve this page" button, any time you see something confusing, or have a suggestion for something that could be improved.
-* Browse through [the Jekyll discussion forum](https://talk.jekyllrb.com/), and lend a hand answering questions. There's a good chance you've already experienced what another user is experiencing.
-* Find [an open issue](https://github.com/jekyll/jekyll/issues) (especially [those labeled `help-wanted`](https://github.com/jekyll/jekyll/issues?q=is%3Aopen+is%3Aissue+label%3Ahelp-wanted)), and submit a proposed fix. If it's your first pull request, we promise we won't bite, and are glad to answer any questions.
-* Help evaluate [open pull requests](https://github.com/jekyll/jekyll/pulls), by testing the changes locally and reviewing what's proposed.
+- [Install Jekyll on your computer](https://jekyllrb.com/docs/installation/) and kick the tires. Does it work? Does it do what you'd expect? If not, [open an issue](https://github.com/jekyll/jekyll/issues/new) and let us know.
+- Comment on some of the project's [open issues](https://github.com/jekyll/jekyll/issues). Have you experienced the same problem? Know a work around? Do you have a suggestion for how the feature could be better?
+- Read through the [documentation](https://jekyllrb.com/docs/home/), and click the "improve this page" button, any time you see something confusing, or have a suggestion for something that could be improved.
+- Browse through the [Jekyll discussion forum](https://talk.jekyllrb.com/), and lend a hand answering questions. There's a good chance you've already experienced what another user is experiencing.
+- Find an [open issue](https://github.com/jekyll/jekyll/issues) (especially [those labeled `help-wanted`](https://github.com/jekyll/jekyll/issues?q=is%3Aopen+is%3Aissue+label%3Ahelp-wanted)), and submit a proposed fix. If it's your first pull request, we promise we won't bite, and are glad to answer any questions.
+- Help evaluate [open pull requests](https://github.com/jekyll/jekyll/pulls), by testing the changes locally and reviewing what's proposed.
 
 ## Submitting a pull request
 
 ### Pull requests generally
 
-* The smaller the proposed change, the better. If you'd like to propose two unrelated changes, submit two pull requests.
+- The smaller the proposed change, the better. If you'd like to propose two unrelated changes, submit two pull requests.
 
-* The more information, the better. Make judicious use of the pull request body. Describe what changes were made, why you made them, and what impact they will have for users.
+- The more information, the better. Make judicious use of the pull request body. Describe what changes were made, why you made them, and what impact they will have for users.
 
-* Pull requests are easy and fun. If this is your first pull request, it may help to [understand GitHub Flow](https://guides.github.com/introduction/flow/).
+- If this is your first pull request, it may help to [understand GitHub Flow](https://guides.github.com/introduction/flow/).
 
-* If you're submitting a code contribution, be sure to read the [code contributions](#code-contributions) section below.
+- If you're submitting a code contribution, be sure to read the [code contributions](#code-contributions) section below.
 
 ### Submitting a pull request via github.com
 
@@ -49,7 +49,7 @@ That's it! You'll be automatically subscribed to receive updates as others revie
 2. Clone the repository locally `git clone https://github.com/<you-username>/jekyll`.
 3. Create a new, descriptively named branch to contain your change ( `git checkout -b my-awesome-feature` ).
 4. Hack away, add tests. Not necessarily in that order.
-5. Make sure everything still passes by running `script/cibuild` (see [the tests section](#running-tests-locally) below)
+5. Make sure everything still passes by running `script/cibuild` (see the [tests section](#running-tests-locally) below)
 6. Push the branch up ( `git push origin my-awesome-feature` ).
 7. Create a pull request by visiting `https://github.com/<your-username>/jekyll` and following the instructions at the top of the screen.
 
@@ -76,11 +76,12 @@ If you ever need to update our documentation with an icon that is not already av
 5. Click `Generate Font` on the bottom-horizontal-bar.
 6. Inspect the included icons and proceed by clicking `Download`.
 7. Extract the font files and adapt the CSS to the paths we use in Jekyll:
-  - Copy the entire `fonts` directory over and overwrite existing ones at `<jekyll>/docs/`.
-  - Copy the contents of `selection.json` and overwrite existing content inside `<jekyll>/docs/icomoon-selection.json`.
-  - Copy the entire `@font-face {}` declaration and only the **new-icon(s)' css declarations** further below, to update the
+
+- Copy the entire `fonts` directory over and overwrite existing ones at `<jekyll>/docs/`.
+- Copy the contents of `selection.json` and overwrite existing content inside `<jekyll>/docs/icomoon-selection.json`.
+- Copy the entire `@font-face {}` declaration and only the **new-icon(s)' css declarations** further below, to update the
   `<jekyll>/docs/_sass/_font-awesome.scss` sass partial.
-  - Fix paths in the `@font-face {}` declaration by adding `../` before `fonts/FontAwesome.*` like so:
+- Fix paths in the `@font-face {}` declaration by adding `../` before `fonts/FontAwesome.*` like so:
   `('../fonts/Fontawesome.woff?9h6hxj')`.
 
 ### Adding plugins
@@ -89,7 +90,7 @@ If you want to add your plugin to the [list of plugins](https://jekyllrb.com/doc
 
 ## Code Contributions
 
-Interesting in submitting a pull request? Awesome. Read on. There's a few common gotchas that we'd love to help you avoid.
+Interested in submitting a pull request? Awesome. Read on. There's a few common gotchas that we'd love to help you avoid.
 
 ### Tests and documentation
 
@@ -101,19 +102,21 @@ If your contribution changes any Jekyll behavior, make sure to update the docume
 
 #### Tests
 
-* If you're creating a small fix or patch to an existing feature, a simple test is more than enough. You can usually copy/paste from an existing example in the `tests` folder, but if you need you can find out about our tests suites [Shoulda](https://github.com/thoughtbot/shoulda/tree/master) and [RSpec-Mocks](https://github.com/rspec/rspec-mocks).
+- If you're creating a small fix or patch to an existing feature, a simple test is more than enough. You can usually copy/paste from an existing example in the `tests` folder, but if you need you can find out about our tests suites [Shoulda](https://github.com/thoughtbot/shoulda/tree/master) and [RSpec-Mocks](https://github.com/rspec/rspec-mocks).
 
-* If it's a brand new feature, create a new [Cucumber](https://github.com/cucumber/cucumber/) feature, reusing existing steps where appropriate.
+- If it's a brand new feature, create a new [Cucumber](https://github.com/cucumber/cucumber/) feature, reusing existing steps where appropriate.
 
 ### Code contributions generally
 
-* Jekyll uses the [Rubocop](https://github.com/bbatsov/rubocop) static analyzer to ensure that contributions follow the [GitHub Ruby Styleguide](https://github.com/styleguide/ruby). Please check your code using `script/fmt` and resolve any errors before pushing your branch.
+- Jekyll uses the [Rubocop](https://github.com/bbatsov/rubocop) static analyzer to ensure that contributions follow the [GitHub Ruby Styleguide](https://github.com/styleguide/ruby). Please check your code using `script/fmt` and resolve any errors before pushing your branch.
 
-* Don't bump the Gem version in your pull request (if you don't know what that means, you probably didn't).
+- Don't bump the Gem version in your pull request (if you don't know what that means, you probably didn't).
 
-* You can use the command `script/console` to start a REPL to explore the result of
-Jekyll's methods. It also provides you with helpful methods to quickly create a
-site or configuration. [Feel free to check it out!](https://github.com/jekyll/jekyll/blob/master/script/console)
+- You can use the command `script/console` to start a REPL to explore the result of
+  Jekyll's methods. It also provides you with helpful methods to quickly create a
+  site or configuration. [Feel free to check it out!](https://github.com/jekyll/jekyll/blob/master/script/console)
+
+- Previously, we've used the WIP Probot app to help contributors determine whether their pull request is ready for review. Please use a [draft pull request](https://help.github.com/en/articles/about-pull-requests#draft-pull-requests) instead. When you're ready, [mark the pull request as ready for review](https://help.github.com/en/articles/changing-the-stage-of-a-pull-request)
 
 ## Running tests locally
 
@@ -146,6 +149,10 @@ script/cucumber features/blah.feature
 Both `script/test` and `script/cucumber` can be run without arguments to
 run its entire respective suite.
 
+## Visual Studio Code Development Container
+
+If you've got [Visual Studio Code](https://code.visualstudio.com/) with the [Remote Development Extension Pack](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.vscode-remote-extensionpack) installed then simply opening this repository in Visual Studio Code and following the prompts to "Re-open In A Development Container" will get you setup and ready to go with a fresh environment with all the requirements installed.
+
 ## A thank you
 
 Thanks! Hacking on Jekyll should be fun. If you find any of this hard to figure out, let us know so we can improve our process or documentation!

.github/FUNDING.yml

@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+# github: jekyll
+open_collective: jekyll
+tidelift: rubygems/jekyll

.github/ISSUE_TEMPLATE.md

@@ -1,78 +0,0 @@
-<!--
-  Hi! Thanks for considering to file a bug with Jekyll. Please take the time to
-  answer the basic questions. You can convert `[ ]` into `[x]` to check boxes (or submit
-  and check.) If there is no need for certain fields like output and redirection, please delete
-  those headers before submitting. We know not all tickets require those steps.
-  Otherwise, please try to be as detailed as possible.
-
-  If you are unsure this is a bug in Jekyll, or this is a bug caused
-  by a plugin that isn't directly related to Jekyll, or if this is just
-  a generic usage question, please consider asking your question at
-  https://talk.jekyllrb.com where non-bug questions go.
-
-  Thanks!
--->
-
-- [ ] I believe this to be a bug, not a question about using Jekyll.
-- [ ] I updated to the latest Jekyll (or) if on GitHub Pages to the latest `github-pages`
-- [ ] I ran `jekyll doctor` to check my configuration
-- [ ] I read the CONTRIBUTION file at https://jekyllrb.com/docs/contributing/
-- [ ] This is a feature request.
-
----
-
-- [ ] I am on (or have tested on) ***macOS*** 10+
-- [ ] I am on (or have tested on) ***Debian/Ubuntu*** GNU/Linux
-- [ ] I am on (or have tested on) ***Fedora*** GNU/Linux
-- [ ] I am on (or have tested on) ***Arch*** GNU/Linux
-- [ ] I am on (or have tested on) ***Other*** GNU/Linux
-- [ ] I am on (or have tested on) ***Windows*** 10+
-
-<!--
-  Other GNU/Linux includes Scientific GNU/Linux, CentOS GNU/Linux, and others.
-  If you are on a minor sub-distro (such as ElementaryOS which does not diverge from
-  Ubuntu much, please check the parent distro. Kubuntu, Edubuntu, Lubuntu should
-  also be flagged as Ubuntu as their packages come from upstream Ubuntu.
--->
-
----
-
-- [ ] I was trying to install.
-- [ ] There is a broken Plugin API.
-- [ ] I had an error on GitHub Pages, and I have reproduced it locally.
-- [ ] I had an error on GitHub Pages, and GitHub Support said it was a Jekyll Bug.
-- [ ] I had an error on GitHub Pages and I did not test it locally.
-- [ ] I was trying to build.
-- [ ] It was another bug.
-
-## My Reproduction Steps
-
-<!--
-  If this error occurred on GitHub Pages, please try to provide us with logs,
-  and look at them yourself, to determine if this is an actual Jekyll bug. In
-  the event you are unsure, file a ticket, however, when you do please provide
-  the logs (strip them of personal information.)
-
-  If you have trouble finding your logs, please email support@github.com and
-  they will happily help you. If you cannot find logs, please try your best to
-  replicate it locally because we cannot fix a problem if we do not know
-  exactly what caused it, or within a relatively close distance.
--->
-
-<!--
-  Insert the steps you took to for this problem to exist. Such as the
-  directories you created and, the full command you ran, and include any
-  plugins you have installed, this is very important.
-
-  If your steps are complicated, you can also submit a GitHub
-  repository (please no zips, they will be removed and rejected by maintainers,)
-  and just supply a command for us to reproduce it ourselves.
--->
-
-## The Output I Wanted
-
-<!--
-  Insert the output from the command. Alter it as little as you can.
-  The minimum should be personal information. Though we normally don't log
-  anything like that so there should be no need to alter it.
--->

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,71 @@
+---
+name: Bug Report
+about: Is something not working as expected?
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+  Hi! Thanks for considering to file a bug with Jekyll. Please take the time to
+  answer the basic questions. Please try to be as detailed as possible.
+
+  If you are unsure this is a bug in Jekyll, or this is a bug caused
+  by a plugin that isn't directly related to Jekyll, or if this is just
+  a generic usage question, please consider asking your question at
+  https://talk.jekyllrb.com where non-bug questions go.
+
+  Thanks!
+-->
+
+<!-- 
+  Make sure that you've done all of these. If you're sure that the bug you're
+  reporting is only apparent in a previous version of Jekyll, please say so explicitly
+  in your description.
+
+  - I updated to the latest Jekyll (or) if on GitHub Pages to the latest `github-pages`
+  - I ran `jekyll doctor` to check my configuration
+  - I read the contributing document at https://jekyllrb.com/docs/contributing/
+-->
+
+## My Environment
+
+<!--
+  Replace the values in the Version(s) column with the ones in your build. If you're not
+  using `github-pages`, just replace it with "No".
+-->
+
+| Software         | Version(s) |
+| ---------------- | ---------- |
+| Operating System |            |
+| `jekyll`         | Latest     |
+| `github-pages`   | Latest     |
+
+---
+
+## Expected Behaviour
+
+<!--
+  What is it you expected to happen? This should be a description of how the
+  functionality you tried to use is supposed to work.
+-->
+
+## Current Behavior
+
+<!--
+  Describe the details of the bug. Be sure to include any steps you took for the
+  problem to exist, such as the directories you created and the full command
+  you ran. Include any plugins you have installed (this is very important!).
+
+  You can include any logs you think relevant here. If you're using GitHub pages
+  and you're not sure where your logs are, please email support@github.com and
+  they will happily help you.
+-->
+
+## Code Sample
+
+<!--
+  Please provide a code repository, gist, code snippet or sample files to
+  reproduce the issue.
+-->

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Jekyll Community Forum
+    url: https://talk.jekyllrb.com/
+    about: Please ask and answer questions here.

.github/ISSUE_TEMPLATE/documentation.md

@@ -0,0 +1,24 @@
+---
+name: Documentation
+about: Found a typo or something that isn't crystal clear in our docs?
+title: 'docs: '
+labels: documentation
+assignees: DirtyF
+
+---
+
+<!-- Thanks for taking the time to open an issue and help us make Jekyll better! -->
+
+## Motivation
+
+<!-- Why should we update our docs? -->
+
+
+
+## Suggestion
+
+<!-- What should we do instead? -->
+
+
+
+<!-- Thanks for taking the time to open an issue and help us make Jekyll better! -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,73 @@
+---
+name: Feature Request
+about: Want us to add any features to Jekyll?
+title: 'feat: '
+labels: feature
+assignees: ''
+
+---
+
+<!--
+  Hi! Thanks for considering to file a feature request with Jekyll. Please take the time to
+  answer the basic questions. Please try to be as detailed as possible.
+
+  Thanks!
+-->
+
+## Summary
+
+<!--
+  A one-paragraph explanation of the feature.
+-->
+
+## Motivation
+
+<!--
+  Why do you want to see this feature in Jekyll? What makes you sure that it should not be
+  implemented at the plugin level, but in Jekyll core? What use cases does it support?
+
+  NOTE: Please be mindful of the Jekyll philosophy (https://jekyllrb.com/philosophy/),
+  particularily Section 5. Think about if 90% of the users would benefit from your
+  feature request, and whether your feature would be better off in a plugin.
+-->
+
+## Guide-level explanation
+
+<!--
+  Explain the proposal as if it was already included in the project and you
+  were teaching it to another programmer. That generally means:
+
+  - Introducing new named concepts.
+  - Explaining the feature largely in terms of examples.
+  - If applicable, provide sample error messages, deprecation warnings, or
+    migration guidance.
+
+  If this is a small feature, you may omit this section.
+-->
+
+## Reference-level explanation
+
+<!--
+  This is the technical portion of the feature request. Explain the design in
+  sufficient detail that:
+
+  - Its interaction with other features is clear.
+  - It is reasonably clear how the feature would be implemented.
+  - Corner cases are dissected by example.
+
+  If you do not know how to answer this, you can omit it. No worries!
+-->
+
+## Drawbacks
+
+<!--
+  Why should we *not* do this?
+-->
+
+## Unresolved Questions
+
+<!--
+  What related issues do you consider out of scope for this feature that could be
+  addressed in the future independently of the solution that comes out of this
+  feature?
+-->

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,46 @@
+<!--
+  Thanks for creating a Pull Request! Before you submit, please make sure
+  you've done the following:
+
+  - I read the contributing document at https://jekyllrb.com/docs/contributing/
+-->
+
+<!--
+  Make our lives easier! Choose one of the following by uncommenting it:
+-->
+
+<!-- This is a 🐛 bug fix. -->
+<!-- This is a 🙋 feature or enhancement. -->
+<!-- This is a 🔦 documentation change. -->
+<!-- This is a 🔨 code refactoring. -->
+
+<!--
+  Before you submit this pull request, make sure to have a look at the following
+  checklist. If you don't know how to do some of these, that's fine! Submit
+  your pull request and we will help you out on the way.
+
+  - I've added tests (if it's a bug, feature or enhancement)
+  - I've adjusted the documentation (if it's a feature or enhancement)
+  - The test suite passes locally (run `script/cibuild` to verify this)
+-->
+
+## Summary
+
+<!--
+  Provide a description of what your pull request changes.
+-->
+
+## Context
+
+<!--
+  Is this related to any GitHub issue(s)?
+
+  You can use keywords to automatically close the related issue.
+  For example, (all of) the following will close issue #4567 when your PR is merged.
+
+  Closes #4567
+  Fixes #4567
+  Resolves #4567
+
+  Use any one of the above as applicable.
+-->

.github/config.yml

@@ -0,0 +1,15 @@
+updateDocsComment: >
+  Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would update some of our documentation based on your changes.
+
+updateDocsWhiteList:
+  - bug
+  - fix
+  - Backport
+  - dev
+  - Update
+  - WIP
+  - chore
+
+updateDocsTargetFiles:
+  - README
+  - docs/

.github/workflows/actions/memprof.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'jekyll'
+require 'memory_profiler'
+
+MemoryProfiler.report(allow_files: ['lib/jekyll/', 'lib/jekyll.rb']) do
+  Jekyll::PluginManager.require_from_bundler
+  Jekyll::Commands::Build.process({
+    "source"             => File.expand_path(ARGV[0]),
+    "destination"        => File.expand_path("#{ARGV[0]}/_site"),
+    "disable_disk_cache" => true,
+  })
+  puts ''
+end.pretty_print(scale_bytes: true, normalize_paths: true)

.github/workflows/ci.yml

@@ -0,0 +1,85 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+    - 4.2-stable
+  pull_request:
+    branches:
+    - 4.2-stable
+
+jobs:
+  ci:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: 'Ruby ${{ matrix.ruby_version }}'
+    runs-on: 'ubuntu-latest'
+    env:
+      CI: true
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+        - 2.7
+        - jruby-9.2.11.1
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+    - name: "Set up Ruby ${{ matrix.ruby_version }}"
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby_version }}
+        bundler-cache: true
+    - name: Run Unit Tests
+      run: bash script/test
+    - name: Run Cucumber Features
+      run: bash script/cucumber
+    - name: Sanity Check
+      run: bash script/default-site
+
+  style_check:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: 'Code Style Check (Ruby ${{ matrix.ruby_version }})'
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+    - name: "Set up Ruby ${{ matrix.ruby_version }}"
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby_version }}
+        bundler-cache: true
+    - name: Run RuboCop
+      run: bash script/fmt
+
+  profile_docs:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: 'Profile Docs Site (Ruby ${{ matrix.ruby_version }})'
+    runs-on: 'ubuntu-latest'
+    env:
+      CI: true
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+    - name: "Set up Ruby ${{ matrix.ruby_version }}"
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby_version }}
+        bundler-cache: true
+    - name: Build Docs site with --profile
+      run: bash script/profile-docs
+    - name: Profile memory usage of building Docs site
+      run: bash script/memprof

.github/workflows/docs.yml

@@ -0,0 +1,59 @@
+name: Build and deploy Jekyll documentation site
+
+on:
+  push:
+    branches:
+      - master
+
+env:
+  RUBY_VERSION: 2.7
+
+jobs:
+  deploy_docs:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    runs-on: 'ubuntu-latest'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-ruby@v1
+        with:
+          ruby-version: ${{ env.RUBY_VERSION }}
+      - name: Setup cache for Bundler
+        id: cache
+        uses: actions/cache@v2
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-
+      - name: Set up dependencies
+        run: |
+          bundle install --path=vendor/bundle --jobs 4 --retry 3
+          bundle clean
+      - name: Clone target branch
+        run: |
+          REMOTE_BRANCH="${REMOTE_BRANCH:-gh-pages}"
+          REMOTE_REPO="https://${GITHUB_ACTOR}:${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git"
+
+          echo "Publishing to ${GITHUB_REPOSITORY} on branch ${REMOTE_BRANCH}"
+          rm -rf docs/_site/
+          git clone --depth=1 --branch="${REMOTE_BRANCH}" --single-branch --no-checkout \
+            "${REMOTE_REPO}" docs/_site/
+      - name: Build site
+        run: bundle exec jekyll build --source docs --destination docs/_site --verbose --trace
+        env:
+          # For jekyll-github-metadata
+          JEKYLL_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Deploy to GitHub Pages
+        run: |
+          SOURCE_COMMIT="$(git log -1 --pretty="%an: %B" "$GITHUB_SHA")"
+          pushd docs/_site &>/dev/null
+          : > .nojekyll
+
+          git add --all
+          git -c user.name="${GITHUB_ACTOR}" -c user.email="${GITHUB_ACTOR}@users.noreply.github.com" \
+            commit --quiet \
+            --message "Deploy docs from ${GITHUB_SHA}" \
+            --message "$SOURCE_COMMIT"
+          git push
+
+          popd &>/dev/null

.github/workflows/third-party.yml

@@ -0,0 +1,42 @@
+name: Third-Party Repository Profiling
+
+on:
+  push:
+    branches:
+      - 4.2-stable
+  pull_request:
+    branches:
+      - 4.2-stable
+jobs:
+  build_n_profile:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    runs-on: 'ubuntu-latest'
+    env:
+      BUNDLE_GEMFILE: "sandbox/Gemfile"
+      BUNDLE_PATH: "vendor/bundle"
+      BUNDLE_JOBS: 4
+      BUNDLE_RETRY: 3
+      CI: true
+    steps:
+    - name: Checkout Jekyll
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+        path: jekyll
+    - name: Checkout Third-Party Repository
+      uses: actions/checkout@v2
+      with:
+        repository: ashmaroli/tomjoht.github.io
+        path: sandbox
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 2.7
+        bundler-cache: true
+    - name: Run Jekyll Build 3 times
+      run: |
+        bundle exec jekyll build -s sandbox -d sandbox/_site --trace
+        bundle exec jekyll build -s sandbox -d sandbox/_site --trace
+        bundle exec jekyll build -s sandbox -d sandbox/_site --trace
+    - name: Memory Analysis of Jekyll Build
+      run: bundle exec ruby jekyll/.github/workflows/actions/memprof.rb sandbox

.gitignore

@@ -1,23 +1,28 @@
-*.gem
-*.swp
-*~
-.DS_Store
-.analysis
+# Jekyll
+_site/
+*-cache/
+.jekyll-metadata
+
+# Ruby
 .bundle/
 .byebug_history
-.jekyll-metadata
 .ruby-gemset
 .ruby-version
-.sass-cache
-/test/source/file_name.txt
-/vendor
+*.gem
 Gemfile.lock
-_site/
-bin/
+
+# Files
+.analysis
+.DS_Store
+*.swp
+*~
+
+# Folders
+/vendor
 bbin/
+bin/
 coverage
 gh-pages/
 pkg/
-site/_site/
 test/dest
 tmp/*

.rubocop.yml

@@ -1,6 +1,8 @@
 ---
+inherit_from: .rubocop_todo.yml
 
 require:
+  - rubocop-performance
   - ./rubocop/jekyll
 
 Jekyll/NoPutsAllowed:
@@ -8,9 +10,11 @@ Jekyll/NoPutsAllowed:
     - rake/*.rake
 
 AllCops:
-  TargetRubyVersion: 2.3
+  SuggestExtensions: false
+  TargetRubyVersion: 2.4
   Include:
     - lib/**/*.rb
+    - test/**/*.rb
   Exclude:
     - bin/**/*
     - exe/**/*
@@ -18,97 +22,192 @@ AllCops:
     - script/**/*
     - vendor/**/*
     - tmp/**/*
-Layout/AlignArray:
-  Enabled: false
-Layout/AlignHash:
-  EnforcedHashRocketStyle: table
-Layout/AlignParameters:
-  Enabled: false
-Layout/EmptyLinesAroundAccessModifier:
-  Enabled: false
-Layout/EmptyLinesAroundModuleBody:
-  Enabled: false
-Layout/EndOfLine:
-  EnforcedStyle: native
-Layout/ExtraSpacing:
-  AllowForAlignment: true
-Layout/FirstParameterIndentation:
-  EnforcedStyle: consistent
-Layout/IndentationWidth:
-  Severity: error
-Layout/IndentArray:
-  EnforcedStyle: consistent
-Layout/IndentHash:
-  EnforcedStyle: consistent
-Layout/IndentHeredoc:
-  Enabled: false
-Layout/MultilineMethodCallIndentation:
-  EnforcedStyle: indented
-Layout/MultilineOperationIndentation:
-  EnforcedStyle: indented
-Lint/NestedPercentLiteral:
-  Exclude:
-    - test/test_site.rb
+
+Layout/BeginEndAlignment:
+  Enabled: true
 Layout/EmptyComment:
   Enabled: false
+Layout/EmptyLinesAroundAttributeAccessor:
+  Enabled: true
 Layout/EndAlignment:
   Severity: error
-Lint/UnneededRequireStatement:
-  Enabled: false
-Lint/UnreachableCode:
+Layout/HashAlignment:
+  EnforcedHashRocketStyle: table
+Layout/IndentationWidth:
   Severity: error
-Lint/UselessAccessModifier:
-  Enabled: false
-Lint/Void:
-  Enabled: false
-Metrics/AbcSize:
-  Max: 21
-Metrics/BlockLength:
-  Exclude:
-    - test/**/*.rb
-    - lib/jekyll/configuration.rb
-    - rake/*.rake
-    - jekyll.gemspec
-Metrics/ClassLength:
-  Exclude:
-    - !ruby/regexp /features\/.*.rb$/
-    - !ruby/regexp /test\/.*.rb$/
-  Max: 300
-Metrics/CyclomaticComplexity:
-  Max: 9
-Metrics/LineLength:
+Layout/FirstArrayElementIndentation:
+  EnforcedStyle: consistent
+Layout/FirstHashElementIndentation:
+  EnforcedStyle: consistent
+Layout/LineLength:
   Exclude:
     - !ruby/regexp /features\/.*.rb/
     - Rakefile
     - rake/*.rake
     - Gemfile
-    - jekyll.gemspec
-  Max: 90
+  Max: 100
   Severity: warning
+Layout/MultilineMethodCallIndentation:
+  EnforcedStyle: indented
+Layout/MultilineOperationIndentation:
+  EnforcedStyle: indented
+Layout/SpaceAroundMethodCallOperator:
+  Enabled: true
+Layout/SpaceInsideHashLiteralBraces:
+  Enabled: true
+  Exclude:
+    - test/**/*.rb
+
+Lint/BinaryOperatorWithIdenticalOperands:
+  Enabled: true
+Lint/ConstantDefinitionInBlock:
+  Enabled: true
+  Exclude:
+    - test/**/*.rb
+Lint/DeprecatedOpenSSLConstant:
+  Enabled: true
+Lint/DuplicateBranch:
+  Enabled: true
+Lint/DuplicateElsifCondition:
+  Enabled: true
+Lint/DuplicateRegexpCharacterClassElement:
+  Enabled: true
+Lint/DuplicateRescueException:
+  Enabled: true
+Lint/DuplicateRequire:
+  Enabled: true
+Lint/EmptyBlock:
+  Enabled: true
+Lint/EmptyClass:
+  Enabled: true
+Lint/EmptyConditionalBody:
+  Enabled: true
+Lint/EmptyFile:
+  Enabled: true
+Lint/FloatComparison:
+  Enabled: true
+Lint/HashCompareByIdentity:
+  Enabled: true
+Lint/IdentityComparison:
+  Enabled: true
+Lint/MissingSuper:
+  Enabled: false
+Lint/MixedRegexpCaptureTypes:
+  Enabled: false
+Lint/NestedPercentLiteral:
+  Exclude:
+    - test/test_site.rb
+Lint/NoReturnInBeginEndBlocks:
+  Enabled: true
+Lint/OutOfRangeRegexpRef:
+  Enabled: true
+Lint/RaiseException:
+  Enabled: true
+Lint/RedundantSafeNavigation:
+  Enabled: true
+Lint/SelfAssignment:
+  Enabled: true
+Lint/StructNewOverride:
+  Enabled: true
+Lint/ToEnumArguments:
+  Enabled: false
+Lint/TopLevelReturnWithArgument:
+  Enabled: true
+Lint/TrailingCommaInAttributeDeclaration:
+  Enabled: true
+Lint/UnmodifiedReduceAccumulator:
+  Enabled: true
+Lint/UnreachableCode:
+  Severity: error
+Lint/UnreachableLoop:
+  Enabled: true
+Lint/UselessMethodDefinition:
+  Enabled: true
+Lint/UselessTimes:
+  Enabled: true
+Lint/Void:
+  Exclude:
+    - lib/jekyll/site.rb
+
+Metrics/AbcSize:
+  Max: 23
+Metrics/BlockLength:
+  Exclude:
+    - test/**/*.rb
+    - lib/jekyll/configuration.rb
+    - rake/*.rake
+Metrics/ClassLength:
+  Exclude:
+    - !ruby/regexp /features\/.*.rb$/
+    - !ruby/regexp /test\/.*.rb$/
+    - lib/jekyll/document.rb
+    - lib/jekyll/site.rb
+    - lib/jekyll/commands/serve.rb
+    - lib/jekyll/configuration.rb
+  Max: 240
+Metrics/CyclomaticComplexity:
+  Exclude:
+    - lib/jekyll/utils.rb
+    - lib/jekyll/commands/serve.rb
+  Max: 11
 Metrics/MethodLength:
   CountComments: false
   Max: 20
   Severity: error
 Metrics/ModuleLength:
   Max: 240
+  Exclude:
+    - lib/jekyll/filters.rb
 Metrics/ParameterLists:
   Max: 4
 Metrics/PerceivedComplexity:
-  Max: 8
+  Max: 13
+
 Naming/FileName:
   Enabled: false
 Naming/HeredocDelimiterNaming:
-  Enabled: false
+  Exclude:
+    - test/**/*.rb
 Naming/MemoizedInstanceVariableName:
   Exclude:
-    - lib/jekyll/page_without_a_file.rb
-    - lib/jekyll/drops/unified_payload_drop.rb
+    - lib/jekyll/convertible.rb
     - lib/jekyll/drops/site_drop.rb
-Naming/UncommunicativeMethodParamName:
-  AllowedNames:
-    - _
-Performance/UnfreezeString:
+    - lib/jekyll/drops/unified_payload_drop.rb
+    - lib/jekyll/page_without_a_file.rb
+
+Performance/AncestorsInclude:
   Enabled: false
+Performance/ArraySemiInfiniteRangeSlice:
+  Enabled: true
+Performance/BigDecimalWithNumericArgument:
+  Enabled: true
+Performance/BlockGivenWithExplicitBlock:
+  Enabled: true
+Performance/ChainArrayAllocation:
+  Enabled: true
+Performance/CollectionLiteralInLoop:
+  Enabled: true
+Performance/ConstantRegexp:
+  Enabled: true
+Performance/MethodObjectAsBlock:
+  Enabled: true
+Performance/RedundantSortBlock:
+  Enabled: true
+Performance/RedundantStringChars:
+  Enabled: true
+Performance/ReverseFirst:
+  Enabled: true
+Performance/SortReverse:
+  Enabled: false
+Performance/Squeeze:
+  Enabled: true
+Performance/StringInclude:
+  Enabled: true
+  Exclude:
+    - lib/jekyll/utils/platforms.rb
+Performance/Sum:
+  Enabled: true
+
 Security/MarshalLoad:
   Exclude:
     - !ruby/regexp /test\/.*.rb$/
@@ -117,34 +216,68 @@ Security/YAMLLoad:
   Exclude:
     - !ruby/regexp /features\/.*.rb/
     - !ruby/regexp /test\/.*.rb$/
-Style/Alias:
+
+Style/ArgumentsForwarding:
   Enabled: false
+Style/ArrayCoercion:
+  Enabled: true
+Style/AccessModifierDeclarations:
+  Enabled: false
+Style/AccessorGrouping:
+  Enabled: false
+Style/Alias:
+  EnforcedStyle: prefer_alias_method
 Style/AndOr:
   Severity: error
-Style/BracesAroundHashParameters:
-  Enabled: false
+Style/BisectedAttrAccessor:
+  Enabled: true
+Style/CaseLikeIf:
+  Enabled: true
 Style/ClassAndModuleChildren:
-  Enabled: false
-Style/FrozenStringLiteralComment:
-  EnforcedStyle: always
+  Exclude:
+    - test/**/*.rb
+Style/ClassEqualityComparison:
+  Enabled: true
+Style/CollectionCompact:
+  Enabled: true
+Style/CombinableLoops:
+  Enabled: true
 Style/Documentation:
   Enabled: false
-  Exclude:
-    - !ruby/regexp /features\/.*.rb$/
+Style/DocumentDynamicEvalDefinition:
+  Enabled: true
 Style/DoubleNegation:
   Enabled: false
+Style/ExponentialNotation:
+  Enabled: true
+Style/ExplicitBlockArgument:
+  Enabled: false
 Style/FormatStringToken:
   Exclude:
     - lib/jekyll/utils/ansi.rb
+    - lib/jekyll/liquid_renderer/table.rb
+    - lib/jekyll/profiler.rb
+Style/FrozenStringLiteralComment:
+  EnforcedStyle: always
+Style/GlobalStdStream:
+  Enabled: true
 Style/GuardClause:
   Enabled: false
+Style/HashAsLastArrayItem:
+  Enabled: true
+Style/HashEachMethods:
+  Enabled: true
+Style/HashLikeCase:
+  Enabled: true
 Style/HashSyntax:
   EnforcedStyle: hash_rockets
   Severity: error
-Style/IfUnlessModifier:
-  Enabled: false
-Style/InverseMethods:
+Style/HashTransformKeys:
   Enabled: false
+Style/HashTransformValues:
+  Enabled: true
+Style/KeywordParametersOrder:
+  Enabled: true
 Style/MixinUsage:
   Exclude:
     - test/helper.rb
@@ -152,8 +285,12 @@ Style/ModuleFunction:
   Enabled: false
 Style/MultilineTernaryOperator:
   Severity: error
-Style/NumericPredicate:
-  Enabled: false
+Style/NegatedIfElseCondition:
+  Enabled: true
+Style/NilLambda:
+  Enabled: true
+Style/OptionalBooleanParameter:
+  Enabled: true
 Style/PercentLiteralDelimiters:
   PreferredDelimiters:
     "%q": "{}"
@@ -163,28 +300,50 @@ Style/PercentLiteralDelimiters:
     "%w": "()"
     "%W": "()"
     "%x": "()"
-Style/RedundantFreeze:
+Style/RedundantArgument:
+  Enabled: true
+Style/RedundantAssignment:
+  Enabled: true
+Style/RedundantBegin:
   Enabled: false
-Style/RedundantReturn:
-  Enabled: false
-Style/RedundantSelf:
+Style/RedundantFetchBlock:
   Enabled: false
+Style/RedundantFileExtensionInRequire:
+  Enabled: true
+Style/RedundantRegexpCharacterClass:
+  Enabled: true
+Style/RedundantRegexpEscape:
+  Enabled: true
+Style/RedundantSelfAssignment:
+  Enabled: true
 Style/RegexpLiteral:
   EnforcedStyle: percent_r
 Style/RescueModifier:
   Enabled: false
 Style/SafeNavigation:
-  Enabled: false
+  Exclude:
+    - lib/jekyll/document.rb
 Style/SignalException:
   EnforcedStyle: only_raise
-Style/SingleLineMethods:
+Style/SingleArgumentDig:
+  Enabled: true
+Style/SlicingWithRange:
   Enabled: false
+Style/SoleNestedConditional:
+  Enabled: true
 Style/StringLiterals:
   EnforcedStyle: double_quotes
+Style/StringConcatenation:
+  Enabled: true
+  Exclude:
+    - lib/jekyll/commands/*.rb
+    - test/**/*.rb
 Style/StringLiteralsInInterpolation:
   EnforcedStyle: double_quotes
+Style/SwapValues:
+  Enabled: true
 Style/SymbolArray:
-  Enabled: false
+  EnforcedStyle: brackets
 Style/TrailingCommaInArrayLiteral:
   EnforcedStyleForMultiline: consistent_comma
 Style/TrailingCommaInHashLiteral:

.rubocop_todo.yml

@@ -0,0 +1,25 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config --auto-gen-only-exclude`
+# on 2020-11-23 15:56:48 UTC using RuboCop version 1.4.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+Style/CombinableLoops:
+  Exclude:
+    - 'lib/jekyll/tags/post_url.rb'
+
+# Offense count: 1
+# Configuration parameters: AllowedMethods.
+# AllowedMethods: respond_to_missing?
+Style/OptionalBooleanParameter:
+  Exclude:
+    - 'lib/jekyll/log_adapter.rb'
+
+# Offense count: 1
+# Configuration parameters: Methods.
+Style/RedundantArgument:
+  Exclude:
+    - 'lib/jekyll/tags/link.rb'

.travis.yml

@@ -1,55 +0,0 @@
-bundler_args: --without benchmark:site:development
-script: script/cibuild
-cache: bundler
-language: ruby
-sudo: false
-
-rvm:
-  - &ruby1 2.5.1
-  - &ruby2 2.4.4
-  - &ruby3 2.3.7
-  - &jruby jruby-9.1.16.0
-
-matrix:
-  include:
-    - rvm: *ruby1
-      env: TEST_SUITE=fmt
-    - rvm: *ruby1
-      env: TEST_SUITE=default-site
-  exclude:
-    - rvm: *jruby
-      env: TEST_SUITE=cucumber
-
-env:
-  matrix:
-    - TEST_SUITE=test
-    - TEST_SUITE=cucumber
-branches:
-  only:
-    - master
-    - themes
-    - /*-stable/
-
-notifications:
-  slack:
-    secure: "\
-      dNdKk6nahNURIUbO3ULhA09/vTEQjK0fNbgjVjeYPEvROHgQBP1cIP3AJy8aWs8rl5Yyow4Y\
-      GEilNRzKPz18AsFptVXofpwyqcBxaCfmHP809NX5PHBaadydveLm+TNVao2XeLXSWu+HUNAY\
-      O1AanCUbJSEyJTju347xCBGzESU=\
-    "
-
-addons:
-  code_climate:
-    repo_token:
-      secure: "\
-        mAuvDu+nrzB8dOaLqsublDGt423mGRyZYM3vsrXh4Tf1sT+L1PxsRzU4gLmcV27HtX2Oq9\
-        DA4vsRURfABU0fIhwYkQuZqEcA3d8TL36BZcGEshG6MQ2AmnYsmFiTcxqV5bmlElHEqQuT\
-        5SUFXLafgZPBnL0qDwujQcHukID41sE=\
-      "
-# regular test configuration
-after_success:
-  - bundle exec codeclimate-test-reporter
-
-before_install:
-  - gem update --system
-  - gem install bundler

CODE_OF_CONDUCT.markdown

@@ -1,24 +1,41 @@
 # Code of Conduct
 
-As contributors and maintainers of this project, and in the interest of
-fostering an open and welcoming community, we pledge to respect all people who
-contribute through reporting issues, posting feature requests, updating
-documentation, submitting pull requests or patches, and other activities.
+## Our Pledge
 
-We are committed to making participation in this project a harassment-free
-experience for everyone, regardless of level of experience, gender, gender
-identity and expression, sexual orientation, disability, personal appearance,
-body size, race, ethnicity, age, religion, or nationality.
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, sex characteristics, gender identity and expression,
+level of experience, education, socio-economic status, nationality, personal
+appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
 
 Examples of unacceptable behavior by participants include:
 
-* The use of sexualized language or imagery
-* Personal attacks
-* Trolling or insulting/derogatory comments
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
 * Public or private harassment
-* Publishing other's private information, such as physical or electronic
-  addresses, without explicit permission
-* Other unethical or unprofessional conduct
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
 
 Project maintainers have the right and responsibility to remove, edit, or
 reject comments, commits, code, wiki edits, issues, and other contributions
@@ -26,24 +43,34 @@ that are not aligned to this Code of Conduct, or to ban temporarily or
 permanently any contributor for other behaviors that they deem inappropriate,
 threatening, offensive, or harmful.
 
-By adopting this Code of Conduct, project maintainers commit themselves to
-fairly and consistently applying these principles to every aspect of managing
-this project. Project maintainers who do not follow or enforce the Code of
-Conduct may be permanently removed from the project team.
+## Scope
 
 This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community.
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by opening an issue or contacting a project maintainer. All complaints
-will be reviewed and investigated and will result in a response that is deemed
-necessary and appropriate to the circumstances. Maintainers are obligated to
-maintain confidentiality with regard to the reporter of an incident.
+reported by contacting the project team at [olivia@jekyllrb.com](mailto:olivia@jekyllrb.com). All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
 
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
 
-This Code of Conduct is adapted from the [Contributor Covenant][homepage],
-version 1.3.0, available at
-[http://contributor-covenant.org/version/1/3/0/][version]
+## Attribution
 
-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/3/0/
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [https://www.contributor-covenant.org/version/1/4/code-of-conduct.html](https://www.contributor-covenant.org/version/1/4/code-of-conduct.html)
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see
+[https://www.contributor-covenant.org/faq](https://www.contributor-covenant.org/faq)

Gemfile

@@ -3,31 +3,32 @@
 source "https://rubygems.org"
 gemspec :name => "jekyll"
 
-gem "rake", "~> 12.0"
+gem "rake", "~> 13.0"
 
 group :development do
   gem "launchy", "~> 2.3"
   gem "pry"
 
-  unless RUBY_ENGINE == "jruby"
-    gem "pry-byebug"
-  end
+  gem "pry-byebug" unless RUBY_ENGINE == "jruby"
 end
 
 #
 
 group :test do
-  gem "codeclimate-test-reporter", "~> 1.0.5"
-  gem "cucumber", "~> 3.0"
+  gem "cucumber", RUBY_VERSION >= "2.5" ? "~> 5.1.2" : "~> 4.1"
   gem "httpclient"
   gem "jekyll_test_plugin"
   gem "jekyll_test_plugin_malicious"
+  gem "memory_profiler"
   gem "nokogiri", "~> 1.7"
   gem "rspec"
   gem "rspec-mocks"
-  gem "rubocop", "~> 0.55.0"
+  gem "rubocop", "~> 1.12.0"
+  gem "rubocop-performance"
   gem "test-dependency-theme", :path => File.expand_path("test/fixtures/test-dependency-theme", __dir__)
   gem "test-theme", :path => File.expand_path("test/fixtures/test-theme", __dir__)
+  gem "test-theme-skinny", :path => File.expand_path("test/fixtures/test-theme-skinny", __dir__)
+  gem "test-theme-symlink", :path => File.expand_path("test/fixtures/test-theme-symlink", __dir__)
 
   gem "jruby-openssl" if RUBY_ENGINE == "jruby"
 end
@@ -35,9 +36,7 @@ end
 #
 
 group :test_legacy do
-  if RUBY_PLATFORM =~ %r!cygwin!
-    gem "test-unit"
-  end
+  gem "test-unit" if RUBY_PLATFORM =~ %r!cygwin!
 
   gem "minitest"
   gem "minitest-profile"
@@ -60,36 +59,35 @@ end
 #
 
 group :jekyll_optional_dependencies do
-  gem "coderay", "~> 1.1.0"
   gem "jekyll-coffeescript"
   gem "jekyll-docs", :path => "../docs" if Dir.exist?("../docs") && ENV["JEKYLL_VERSION"]
   gem "jekyll-feed", "~> 0.9"
   gem "jekyll-gist"
   gem "jekyll-paginate"
   gem "jekyll-redirect-from"
-  gem "kramdown", "~> 1.14"
+  gem "kramdown-syntax-coderay"
   gem "mime-types", "~> 3.0"
   gem "rdoc", "~> 6.0"
-  gem "tomlrb", "~> 1.2"
+  gem "tomlrb"
 
-  platform :ruby, :mswin, :mingw, :x64_mingw do
-    gem "classifier-reborn", "~> 2.2.0"
-    gem "liquid-c", "~> 3.0"
-    gem "pygments.rb", "~> 1.0"
-    gem "rdiscount", "~> 2.0"
-    gem "yajl-ruby", "~> 1.3"
+  platforms :ruby, :mswin, :mingw, :x64_mingw do
+    gem "classifier-reborn", "~> 2.2"
+    gem "liquid-c", "~> 4.0"
+    gem "yajl-ruby", "~> 1.4"
   end
 
-  # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-  gem "tzinfo-data", :platforms => [:mingw, :mswin, :x64_mingw, :jruby]
+  # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
+  # and associated library
+  platforms :jruby, :mswin, :mingw, :x64_mingw do
+    gem "tzinfo", "~> 1.2"
+    gem "tzinfo-data"
+  end
 end
 
 #
 
 group :site do
-  if ENV["PROOF"]
-    gem "html-proofer", "~> 3.4"
-  end
+  gem "html-proofer", "~> 3.4" if ENV["PROOF"]
 
   gem "jekyll-avatar"
   gem "jekyll-mentions"

History.markdown

@@ -1,42 +1,656 @@
-## HEAD
+## 4.2.1 / 2021-09-27
 
-### Documentation
+### Bug Fixes
 
-  * Release post for v3.8.0 (#6849)
-  * Add Installation Instructions for Ubuntu (#6925)
-  * add liquid tag jekyll-flickr (#6946)
-  * Add 4.0 development post (#6934)
-  * Updated copy - fixed casing of SaaS on resources page. (#6949)
-  * WIP: Do not advise users to install Jekyll outside of Bundler (#6927)
-  * Don't prompt for sudo when installing with Ubuntu WSL (#6781)
-  * Fix typo (#6969)
-  * Add version number for group_by_exp doc (#6956)
-  * Update Windows install docs (#6926)
-  * Remove documentation for using Redcarpet (#6990)
+  * Backport #8620 for v4.2.x: Revert #7253: "Don't reset site.url to localhost:4000 by default" (#8808)
+  * Backport #8756 for v4.2.x: Respect collections_dir config within include tag (#8794)
+  * Backport #8786 for v4.2.x: Fix regression in Convertible module from v4.2.0 (#8793)
+
+## 4.2.0 / 2020-12-14
 
 ### Minor Enhancements
 
-  * use jekyll-compose if installed (#6932)
-  * Memoize computing excerpt's relative_path (#6951)
-  * Liquefied link tag (#6269)
-  * Suggest re-running command with --trace on fail (#6551)
+  * Warn on command-line with permalink conflict (#8342)
+  * Supress warning issued for redirect pages (#8347)
+  * Enhance detection of conflicting destination URLs (#8459)
+  * Add `:post_convert` hook to modify HTML content before layout (#8368)
+  * Allow triggering `:post_convert` events atomically (#8465)
+  * Debug reading Page and Layout objects (#8100)
+  * Do not reset `site.url` to `http://localhost:4000` by default (#7253)
+  * Add custom debug strings for Jekyll objects (#8473)
+  * Debug reading data files in a site (#8481)
 
-### Major Enhancements
+### Bug Fixes
 
-  * Remove unused error class (#6511)
-  * Drop support for Ruby 2.1 and 2.2 (#6560)
-  * Add vendor folder to a newly installed site's .gitignore (#6968)
-  * bump i18n (#6931)
-  * We are not using Ruby 2.2 anymore (#6977)
-  * Drop support for older versions of Rouge (#6978)
-  * Remove support for Redcarpet (#6987)
+  * Replace nested conditional with guard clauses (#8294)
+  * Fix: security bump (#8349)
+  * Fix path matching regex in post_url Liquid tag (#8375)
+  * Enable `Performance/ChainArrayAllocation` cop (#8404)
+  * Enable Lint/NoReturnInBeginEndBlocks Cop (#8457)
+  * Generate items from `site.include` list only once (#8463)
+  * Explicitly return nil after site process phase (#8472)
+
+### Optimization Fixes
+
+  * Implement custom delegators for drop methods (#8183)
+  * Handle `nil` argument to `Jekyll.sanitized_path` (#8415)
+  * Cache `Jekyll.sanitized_path` (#8424)
+  * Memoize array of drop getter method names (#8421)
+  * Reduce string allocations from the `link` tag (#8387)
+  * Optimize parsing of parameters in `include` tag (#8192)
+  * Stash documents `write?` attribute in a variable (#8389)
+  * Reduce string allocations from generating doc URLs (#8392)
+  * Check if site is in incremental mode optimally (#8401)
+  * Utilize flexibility of `Site#in_dest_dir` (#8403)
+  * Reduce allocations from rendering item as liquid (#8406)
+  * Compute relative_path of pages using PathManager (#8408)
+  * Reduce allocation from `normalize_whitespace` filter (#8400)
+  * Use `Regexp#match?` when `MatchData` is not required (#8427)
+  * Check default front matter scope against symbols (#8393)
+  * Stash frequently used `Drop` setter keys for reuse (#8394)
+  * Memoize defaults computed for Convertibles (#8451)
+  * Reduce array allocations from merging categories (#8453)
+  * Memoize destination of pages, documents and staticfiles (#8458)
+  * Reduce allocations from computing item property (#8485)
+  * Optimize `Page#dir` with a private method (#8489)
+  * Stash attribute hash for Liquid computed for pages (#8497)
 
 ### Development Fixes
 
-  * Remove unnecessary Jekyll::Page constant (#6770)
+  * Update cucumber gem to version 4.1 (#8278)
+  * Move permalink styles data to constant (#8282)
+  * Update rubocop gem to 0.87.1 (#8287)
+  * Update RuboCop to-do file (#8296)
+  * Fix `rake console` generating LoadError (#8312)
+  * Configure Performance cops (#8369)
+  * Update rubocop gem to 0.90.0 (#8313)
+  * Refactor `Jekyll::Utils::Platforms` (#7236)
+  * Bump RuboCop to v0.91.x (#8391)
+  * Add workflow to build and profile third-party repo (#8398)
+  * Bump RuboCop to v0.92.x
+  * Update cucumber gem version to 5.1.2 (#8413)
+  * Fix test suite compatibility with JRuby (#8418)
+  * chore(deps): bump Rubocop to 0.93.0 (#8430)
+  * Use Ruby 2.7.1 in GitHub Actions (#8444)
+  * Test that Liquid expressions are not deeply evaled (#8292)
+  * Test rendering arbitrary Liquid variables by default (#7414)
+  * Migrate TravisCI jobs to GitHub Actions (#8492)
+
+### Documentation
+
+  * Update pointer to special permalink variables for collections (#8274)
+  * Fix special treatment for 'page 1' in docs of pagination (#8230)
+  * Add Formcake to forms section (#8283)
+  * Add a note on the rendering process in the docs (#8291)
+  * Add refactoring type to PULL_REQUEST_TEMPLATE (#8297)
+  * Update resources.md (#7864)
+  * Extra apostrophes in an URL (#8319)
+  * Clarify target of subordinate clause (#8320)
+  * Cherry-pick commits from conflicting branch `docs-40`
+  * Update documentation on third party site (#8352)
+  * Update default.md with info requested in #8314 (#8353)
+  * Clarify description of `safe` option (#8354)
+  * Simplifying the Git post-receive hook-example (#8358)
+  * Add missing doc for build and serve commands (#8365)
+  * Docs Review: Getting Started (#8372)
+  * Add note about rebooting system after installation (#8359)
+  * Use data file to render table at `/docs/configuration/options/#global-configuration` (#8377)
+  * Use data file(s) to render table(s) at `/docs/configuration/options/` (#8380)
+  * Improve maintainability of config option data (#8383)
+  * Remove CircleCI v1 docs (#8410)
+  * Remove `NOKOGIRI_USE_SYSTEM_LIBRARIES` from Travis CI docs (#8409)
+  * Add links to all Jekyll themes on GitHub tagged with #jekyll-theme (#8447)
+  * Document initializing project Gemfile from scratch (#8450)
+  * Document installation of additional dependencies for installing Jekyll on Fedora (#8456)
+  * Improve documentation on Hooks in Jekyll (#8467)
+  * Build docs site with GitHub Actions (#8201)
+  * Add link to Assets page from `_sass` section in `_docs/structure.md` (#8486)
+
+### Site Enhancements
+
+  * Fix rendering of *showcase* images (#8504)
+
+## 4.1.1 / 2020-06-24
+
+### Bug Fixes
+
+  * Disable page excerpts by default (#8222)
+  * Revert introduction of PageDrop (#8221)
+  * Don't generate excerpts for non-html pages (#8234)
+  * Make page excerpts consistent with doc excerpts (#8236)
+
+### Documentation
+
+  * Replace deprecated 'show' command with 'info' (#8235)
+  * Change name to ▲Vercel (#8247)
+  * Add language and examples to describe how to use the configuration op… (#8249)
+  * Fix missing yaml front matter colon and adjust/add clarifying language. (#8250)
+  * correct typo (#8261)
+  * Allow hyperlinks to specific filter documentation (#8231)
+  * Update link to Netlify step-by-step guide (#8264)
+  * Fix grammar in documentation section (#8265)
+
+### Site Enhancements
+
+  * Including correct Sketch website (#8241)
+  * Release post for v4.1.1 (#8243)
+
+### Development Fixes
+
+  * Bump RuboCop to v0.85.x (#8223)
+  * Expect drive letter only on vanilla windows (#8227)
+
+## 4.1.0 / 2020-05-27
+
+### Bug Fixes
+
+  * Memoize `absolute_url` and `relative_url` filters (#7793)
+  * Fix documentation comment for `Jekyll::Converters::Identity` (#7883)
+  * Optimize `Jekyll::Filters#item_property` (#7696)
+  * Allow multiple binary operators in `where_exp` filter (#8047)
+  * Fix documents custom-ordering logic (#8028)
+  * Use `layout.path` when rendering the Liquid layout (#8069)
+  * Reduce array allocations from `StaticFile#path` (#8083)
+  * Simplify `Jekyll::Renderer#validate_layout` (#8064)
+  * Add static file's basename to its `url_placeholder` (#7908)
+  * Clear cached Liquid template scope before render (#7967)
+  * Cache `URLFilter` results of string inputs per site (#7990)
+  * Use `platforms` instead of `install_if` in Gemfile (#8140)
+  * Config include trailing slash (#8113)
+  * Improve path normalization in liquid_renderer (#8075)
+  * Switch slugify regex to support more Unicode character groups (#8167)
+  * Check if entry is a directory once per enumerator (#8177)
+  * Filter out exclusively excluded entries sooner (#7482)
+  * Return `relative_url` if site.url is an empty string (#7988)
+  * Configure kramdown toc_levels as array by default (#8015)
+  * Reduce `Pathname` objects from front matter defaults (#8067)
+  * Simplify `Jekyll::Hooks.trigger` logic (#8044)
+  * Quicker categories for documents without superdirs (#7987)
+  * Reduce `Jekyll::Renderer` instances during a build (#7570)
+  * Escape regex characters in paths to match (#8138)
+  * Provide invokables for common drop query keys (#8165)
+  * Optimize path sanitization of default front matter (#8154)
+  * Initialize static files' data hash only if needed (#8188)
+  * Initialize include-files as Jekyll objects (#8158)
+
+### Minor Enhancements
+
+  * serve: add support for ECC certificates (#7768)
+  * Update `item_property` to recognize integers (#7878)
+  * Include `_config.yml` in a new theme's gemspec (#7865)
+  * Add an option to easily disable disk-cache (#7928)
+  * Optimize markdown parsing with Kramdown by reusing the options and parser objects (#8013)
+  * Add `PageDrop` to provide Liquid templates with data (#7992)
+  * Optimize `Kramdown::JekyllDocument#to_html` calls (#8041)
+  * Configure default language for syntax-highlighting (#8035)
+  * Remove dev dependencies from new theme-gem gemspec (#8042)
+  * Allow disabling import of theme configuration (#8131)
+  * Allow excerpts to be generated for `Page` objects (#7642)
+  * Profile various stages of a site's build process (#6760)
+  * Add find filters to optimize where-first chains (#8171)
+  * Make `number_of_words` filter respect CJK characters (#7813)
+  * Allow extensionless document in a strict site (#7950)
+  * Add `:slugified_categories` URL placeholder (#8094)
+
+### Documentation
+
+  * Add dropped 'title: Staff' to the code (#7805)
+  * Clarify docs for static files in collection (#7812)
+  * Rephrase the CircleCI v2 section (#7815)
+  * Update old GitHub wiki URL with new one (#7823)
+  * Update JekyllConf page with 2019 talks (#7826)
+  * link for memberships (#7825)
+  * Doc: minor fix, should be greater or equal to min version (#7856)
+  * Update third-party.md - Fix broken link (#7857)
+  * clarify _config.yml/collections type (#7873)
+  * Replace backticks with HTML tags in data file (#7879)
+  * add new theme source (#7875)
+  * fixed grammatical error (it's --> its) (#7887)
+  * Docs: Clarify organizing pages into subfolders (#7896)
+  * Disambiguate the placeholder of permalink (#7906)
+  * docs: add short serve command for livereload (#7919)
+  * docs: add options for watch and force polling (#7918)
+  * add install instructions for ArchLinux and openSUSE (#7920)
+  * Improve index page of Jekyll documentation  (#7926)
+  * Include path in `jekyll new` commands (Usage docs) (#7931)
+  * Change `affect` to `effect` in the collections docs (#7937)
+  * Changed deprecated command in themes documentation (#7941)
+  * Adds some documentation for the `:clean`, `:on_obsolete` hook (#7954)
+  * docs: fix broken link (#7955)
+  * Corrected typo (#7975)
+  * docs: remove watch option in config (#7940)
+  * Correct a sentence in the documentation (#7978)
+  * Fix YAML representation of `group_by` result (#7979)
+  * Move `--baseurl` to build command options (#7985)
+  * Correct documentation of filters (#7989)
+  * Document sorting two documents by their `date` (#7870)
+  * Fix English grammar error (#7994)
+  * Update 03-front-matter.md (#7996)
+  * Add Kentico Kontent CMS integration to resources (#8000)
+  * Update 07-assets.md (#7413)
+  * Fix file references in Step by Step Tutorial's Assets step (#8007)
+  * docs: improve highlighting of code blocks (#8017)
+  * remove leading slash from Sass file location (#8021)
+  * [Docs] Fix asset link ref in step-by-step tutorial (#8026)
+  * Corrected command to modify PATH (#8029)
+  * Corrected command to modify PATH (#8030)
+  * Docs: Render full contents of just the latest post (#8032)
+  * docs: improvements for note boxes (#8037)
+  * Non-deprecated `vendor/bundle` path configuration (#8048)
+  * Update 09-collections.md (#8060)
+  * Remove extra paragraph tags (#8063)
+  * Add default front matter for tutorials collection (#8081)
+  * Create CSV to table tutorial (#8090)
+  * Add version badge for Custom Sorting of Documents (#8098)
+  * Docs: Fix grammar in `_docs/front-matter.md` (#8097)
+  * Update variables.md (#8106)
+  * Add help about Gentoo/Linux (#8002)
+  * Update documentation on third party site (#8122)
+  * Added Clear Linux (#8132)
+  * Added note about OS specific installation instructions. (#8135)
+  * Fix broken URL in the Resources Page on the Documentation Site (#8136)
+  * Docs: Deploy Jekyll site with GitHub Actions (#8119)
+  * Clarify `bundle config` in Bundler tutorial (#8150)
+  * docs: update your-first-plugin.md (#8147)
+  * Fix typo in documentation on GitHub Actions (#8162)
+  * Ease discovery of CLI commands (in their entirety) (#8178)
+  * Remove `sudo` from Travis CI tutorial (#8187)
+  * Add Gitlab Pages to 3rd party list (#8191)
+  * docs: add 21yunbox for deployment (#8193)
+  * Improve documentation on tags and categories (#8196)
+
+### Development Fixes
+
+  * Ci/GitHub actions (#7822)
+  * Rubocop version upgrade (#7846)
+  * Split action steps to avoid using `&&` on Windows (#7885)
+  * Upgrade rake to use version 13 (#7910)
+  * Update dependency constraint to allow RuboCop v0.76 (#7893)
+  * Use bash executable consistently (#7909)
+  * Test with JRuby 9.2.9.0 (#7779)
+  * Bump RuboCop to v0.79.x (#7970)
+  * Remove post-install message from gemspec (#7974)
+  * Attain Ruby 3.0 compatibility (#7948)
+  * Test `where` filter handling numeric property values (#7821)
+  * chore(deps): rubocop 0.80.0 (#8012)
+  * Update unit tests for Kramdown-based converter (#8014)
+  * Add Visual Studio Code Development Container (#8016)
+  * chore: simplify require for `Jekyll::VERSION` (#8057)
+  * Remove version-constraint relaxation for i18n gem (#8055)
+  * Mirror `spec.homepage` as `metadata["homepage_uri"]` (#8056)
+  * Bump Ruby versions on Travis builds (#8088)
+  * chore(ci): cache dependencies (#8168)
+
+### Site Enhancements
+
+  * Optimize rendering of the documentation site (#8020)
+  * Utilize `relative_url` filter in documentation site (#8089)
+  * Render tutorial metadata in documentation site (#8092)
+  * Improve syntax-highlighting in documentation site (#8079)
+  * Site: Filter through just the *docs* collection (#8170)
+
+## 4.0.1 / 2020-05-08
+
+### Bug Fixes
+
+  * Prevent console warning with Ruby 2.7 (#8124)
+  * Clear cached Liquid template scope before render (#8141)
+  * Add static file's basename to its url_placeholder (#8142)
+  * Update item_property to recognize integers (#8160)
+
+### Development Fixes
+
+  * Fix Kramdown converter based tests for v4.0.x (#8143)
+
+## 3.9.0 / 2020-08-05
+
+### Minor Enhancements
+
+  * Allow use of kramdown v2 (#8322)
+  * Add default language for kramdown syntax highlighting (#8325)
+
+## 3.8.7 / 2020-05-08
+
+### Bug Fixes
+
+  * Prevent console warnings with Ruby 2.7 (#8125)
+
+## 4.0.0 / 2019-08-19
+
+### Major Enhancements
+
+  * Drop ruby 2.3 (#7454)
+  * Drop support for Ruby 2.1 and 2.2 (#6560)
+  * Drop support for older versions of Rouge (#6978)
+  * Drop support for pygments as syntax-highlighter (#7118)
+  * Drop support for Redcarpet (#6987)
+  * Drop support for rdiscount (#6988)
+  * Drop support for `jekyll-watch-1.4.0` and older (#7287)
+  * Incorporate `relative_url` filter in `link` tag (#6727)
+  * Upgrade kramdown dependency to v2.x (#7492)
+  * Upgrade jekyll-sass-converter to v2.x - Sassc + sourcemaps (#7778)
+  * Upgrade i18n to v1.x (#6931)
+  * Add `Jekyll::Cache` class to handle caching on disk (#7169)
+  * Cache converted markdown (#7159)
+  * Cache: Do not dump undumpable objects (#7190)
+  * Cache matched defaults sets for given parameters (#6888)
+  * Ignore cache directory (#7184)
+  * Add `Site#in_cache_dir` helper method (#7160)
+  * Remove 'cache_dir' during `jekyll clean` (#7158)
+  * Cache parsed Liquid templates in memory (#7136)
+  * Only read layouts from source_dir or theme_dir (#6788)
+  * Allow custom sorting of collection documents (#7427)
+  * Always exclude certain paths from being processed (#7188)
+  * Remove Jekyll::Utils#strip_heredoc in favor of a Ruby > 2.3 built in (#7584)
+  * Incorporate `relative_url` within `post_url` tag (#7589)
+  * Remove patch to modify config for kramdown (#7699)
+
+### Minor Enhancements
+
+  * Enhance `--blank` scaffolding (#7310)
+  * Use `jekyll-compose` if installed (#6932)
+  * Disable Liquid via front matter (#6824)
+  * Configure cache_dir (#7232)
+  * ISO week date drops (#5981)
+  * Fix custom 404 page for GitHub pages (#7132)
+  * Load config file from within current theme-gem (#7304)
+  * Suggest re-running command with `--trace` on fail (#6551)
+  * Support for binary operators in where_exp filter (#6998)
+  * Automatically load `_config.toml` (#7299)
+  * Add vendor folder to a newly installed site's .gitignore (#6968)
+  * Output Jekyll Version while debugging (#7173)
+  * Memoize computing excerpt's relative_path (#6951)
+  * Skip processing posts that can not be read (#7302)
+  * Memoize the return value of Site#documents (#7273)
+  * Cache globbed paths in front matter defaults (#7345)
+  * Cache computed item property (#7301)
+  * Cleanup Markdown converter (#7519)
+  * Do not process Liquid in post excerpt when disabled in front matter (#7146)
+  * Liquefied link tag (#6269)
+  * Update item_property to return numbers as numbers instead of strings (#6608)
+  * Use `.markdown` extension for page templates (#7126)
+  * Add support for `*.xhtml` files (#6854)
+  * Allow i18n v0.9.5 and higher (#7044)
+  * Ignore permission error of /proc/version (#7267)
+  * Strip extra slashes via `Jekyll.sanitized_path` (#7182)
+  * Site template: remove default config for markdown (#7285)
+  * Add a custom inspect string for StaticFile objects (#7422)
+  * Remind user to include gem in the Gemfile on error (#7476)
+  * Search Front matter defaults for Page objects with relative_path (#7261)
+  * Lock use of `tzinfo` gem to v1.x (#7521, #7562)
+  * Utilize absolute paths of user-provided file paths (#7450)
+  * Detect `nil` and empty values in objects with `where` filter (#7580)
+  * Initialize mutations for Drops only if necessary (#7657)
+  * Reduce Array allocations via Jekyll::Cleaner (#7659)
+  * Encode and unencode urls only as required (#7654)
+  * Reduce string allocations with better alternatives (#7643)
+  * Reduce allocations from Jekyll::Document instances (#7625)
+  * Add `type` attribute to Document instances (#7406)
+  * Reduce allocations from where-filter (#7653)
+  * Memoize SiteDrop#documents to reduce allocations (#7697)
+  * Add PathManager class to cache interim paths (#7732)
+  * Remove warnings and fixes for deprecated config (#7440)
+  * Delegate --profile tabulation to `terminal-table` (#7627)
+
+### Bug Fixes
+
+  * Security: fix `include` bypass of `EntryFilter#filter` symlink check (#7226)
+  * Theme gems: ensure directories aren't symlinks (#7419)
+  * Add call to unused method `validate_options` in `commands/serve.rb` (#7122)
+  * Check if scope applies to type before given path (#7263)
+  * Document two methods, simplify one of the methods (#7270)
+  * Check key in collections only if it isn't "posts" (#7277)
+  * Interpolate Jekyll::Page subclass on inspection (#7203)
+  * Measure the no. of times a template gets rendered (#7316)
+  * Reduce array traversal in Jekyll::Reader (#7157)
+  * Re-implement handling Liquid blocks in excerpts (#7250)
+  * Documents should be able to render their date (#7404)
+  * Fix Interpreter warning from Jekyll::Renderer (#7448)
   * Loggers should accept both numbers and symbols (#6967)
+  * Replace regex arg to :gsub with a string arg (#7189)
+  * Dont write static files from unrendered collection (#7410)
+  * Excerpt handling of custom and intermediate tags (#7382)
+  * Change future post loglevel to warn to help user narrow down issues (#7527)
+  * Handle files with trailing dots in their basename (#7315)
+  * Fix unnecessary allocations via StaticFileReader (#7572)
+  * Don't check if site URL is absolute if it is nil (#7498)
+  * Avoid unnecessary duplication of pages array (#7272)
+  * Memoize Site#post_attr_hash (#7276)
+  * Memoize Document#excerpt_separator (#7569)
+  * Optimize Document::DATE_FILENAME_MATCHER to match valid filenames (#7292)
+  * Escape valid special chars in a site's path name (#7568)
+  * Replace `name` in Page#inspect with relative_path (#7434)
+  * Log a warning when the slug is empty (#7357)
+  * Push Markdown link refs to excerpt only as required (#7577)
+  * Fix broken include_relative usage in excerpt (#7633)
+  * Initialize and reset glob_cache only as necessary (#7658)
+  * Revert memoizing Site#docs_to_write and #documents (#7684)
+  * Backport #7684 for v3.8.x: Revert memoizing Site#docs_to_write and refactor #documents (#7689)
+  * Backport #7213 and #7633 for v3.8.x: Fix broken include_relative usage in excerpt (#7690)
+  * Don't read symlinks in site.include in safe mode (#7711)
+  * Replace `String#=~` with `String#match?` (#7723)
+  * Update log output for an invalid theme directory (#7679)
+  * Remove configuration of theme sass files from Core (#7290)
+  * Actually conditionally include liquid-c (#7792)
+  * Test number_like regex on stringified property (#7788)
+
+### Development Fixes
+
+  * Upgrade liquid-c to v4.0 (#7375)
+  * Bump RuboCop to v0.71.0 (#7687)
+  * Target Ruby 2.4 syntax (#7583)
+  * Fix: RuboCop offenses (#7769)
+  * Use communicative method parameters (#7566)
+  * Scan `assert_equal` methods and rectify any offenses with a custom RuboCop cop (#7130)
+  * CI: Test with Ruby 2.6 (#7438)
+  * CI: Test with Ruby 2.6 on AppVeyor (#7518)
+  * CI: Update RuboCop config (#7050)
+  * CI: Add a script to profile docs (#7540)
+  * CI(Appveyor): shallow clone with 5 last commits (#7312)
+  * CI: Test with oldest and latest Ruby only (#7412)
+  * CI: Update excludes for CodeClimate Analyses (#7365)
+  * CI: Lock Travis to Bundler-1.16.2 (#7144)
+  * CI: Bump tested version of JRuby to 9.2.7.0 (#7612)
+  * CI: Do not install docs on updating gems on Travis (#7706)
+  * Update gemspec (#7425)
+  * deps: relax version constraint on classifier-reborn gem (#7471)
+  * deps: update yajl-ruby (#7278)
+  * deps: bump yajl-ruby to v1.4.0 (#6976)
+  * Create symlink only if target is accessible (#7429)
+  * Switch to `:install_if` for wdm gem (#7372)
+  * Add cucumber feature to test include_relative tag (#7213)
+  * Small benchmark refactoring (#7211)
+  * Fix incorrectly passed arguments to assert_equal (#7134)
+  * fix up refute_equal call (#7133)
+  * Fix RuboCop offences in test files (#7128)
+  * Use assert_include (#7093)
+  * Remember to release docs gem (#7066)
+  * Useless privates removed (#6768)
+  * Load Rouge for TestKramdown (#7007)
   * Update instructions for releasing docs Gem (#6975)
-  * yajl-ruby update to v1.4.0 (#6976)
+  * We are not using Ruby 2.2 anymore (#6977)
+  * Remove unnecessary Jekyll::Page constant (#6770)
+  * Remove unused error class (#6511)
+  * Add a Cucumber feature for post_url tag (#7586)
+  * Generate a "TOTAL" row for build-profile table (#7614)
+  * Refactor Jekyll::Cache (#7532)
+  * Store list of expected extnames in a constant (#7638)
+  * Profile allocations from a build session (#7646)
+  * Update small typo in contributing.md (#7671)
+  * Remove override to Jekyll::Document#respond_to? (#7695)
+  * Update TestTags in sync with Rouge v3.4 (#7709)
+  * Use regexp to filter special entries (#7702)
+  * Reduce Array objects generated from utility method (#7749)
+  * Update mime.types (#7756)
+  * Replace redundant Array#map with Array#each (#7761)
+  * Reduce allocations by using #each_with_object (#7758)
+  * Memoize fallback_data for Drop (#7728)
+  * Use String#end_with? to check if entry is a backup (#7701)
+
+### Documentation
+
+  * Refactor docs (#7205)
+  * Add a link to Giraffe Academy's tutorial (#7325)
+  * Do not advise users to install Jekyll outside of Bundler (#6927)
+  * Remove documentation for using Redcarpet (#6990)
+  * Install Docs that Work on MacOS 10.14 (#7561)
+  * Add Installation Instructions for Ubuntu (#6925)
+  * Don't prompt for sudo when installing with Ubuntu WSL (#6781)
+  * Installation instructions for Fedora (#7198)
+  * Update Windows install docs (#6926)
+  * List all standard liquid filters (#7333)
+  * List all static files variables (#7002)
+  * Improve how to include Rouge stylesheets (#7752)
+  * Mention CommonMark plugins (#7418)
+  * Add TSV to list of supported _data files. (#7168)
+  * How to deploy using pre-push git hook (#7179)
+  * Hosting with AWS Amplify (#7510)
+  * CircleCI deployment through CircleCI v2 (#7024)
+  * GitHub Pages: use themes from other repos (#7112)
+  * Document page.dir and page.name (#7373)
+  * Document custom tag blocks (#7359)
+  * Document converter methods (#7289)
+  * Document `{{ page.collection }}` (#7430)
+  * Document Jekyll Filters with YAML data (#7335)
+  * Document where Jekyll looks for layouts in a site (#7564)
+  * plugin: liquid tag jekyll-flickr (#6946)
+  * plugin: jekyll-target-blank (#7046)
+  * plugin: json-get. (#7086)
+  * plugin: `jekyll-info` (#7091)
+  * plugin: jekyll-xml-source (#7114)
+  * plugin: jekyll-firstimage filter (#7127)
+  * plugin: CAT (#7011)
+  * Resources: Statictastic (#7593)
+  * Resources: Bonsai Search (#7543)
+  * Resources: Formspark (#7601)
+  * Resources: Jekpack(#7598)
+  * Resources: formX (#7536)
+  * Resources: 99inbound's Jekyll post (#7348)
+  * Resources: CloudSh (#7497)
+  * Community:  DEV Community's Jekyll tag (#7139)
+  * Showcase: developer.spotify.com (#7217)
+  * Showcase: Isomer (#7300)
+  * Add version number for group_by_exp doc (#6956)
+  * Updated nginx configuration for custom-404-page documentation (#6994)
+  * Clarify definition of 'draft' (#7037)
+  * _drafts need to be contained within the custom collection directory (#6985)
+  * Updated to supported version (#7031)
+  * Add Hints for some Improved Travis Config in Doc (#7049)
+  * Update travis-ci.md to point out "this is an example Gemfile" (#7089)
+  * Instructions to view theme’s files under Linux (#7095)
+  * Use a real theme in the example (#7125)
+  * Update docs about post creation (#7138)
+  * Initialize upgrading doc for v4.0 (#7140)
+  * Add version badge for date filters with ordinal (#7162)
+  * Corrected sample usage of postfiles (#7181)
+  * Resolve "Unable to locate package ruby2.4" error (#7196)
+  * Correct stylesheet url in tutorial step 7 (#7210)
+  * Removes quotes from markdown for assets (#7223)
+  * Clarified front matter requirement (#7234)
+  * Explicit location of where to create blog.html (#7241)
+  * Reference the build command options that allows multiple config files (#7266)
+  * Add more issue template(s) and pull request template (#7269)
+  * Suggest sites use OpenSSL instead of GnuTLS for their site's CI (#7010)
+  * Fix broken Contributors link in README.markdown (#7200)
+  * Add title tag to item in RSS template (#7282)
+  * Add link tag to item in RSS template (#7291)
+  * Remove redundant instruction comment (#7342)
+  * Textile is only supported through a converter plugin (#7003)
+  * Add recursive navigation tutorial (#7720)
+  * Remove installation instructions with Homebrew (#7381)
+  * Fix dead link and misleading prose (#7383)
+  * Fix content management section (#7385)
+  * Apply ruby official guide documents (#7393)
+  * Fix group_by_exp filter example (#7394)
+  * Remove alt attribute from a tags (#7407)
+  * Fix BASH code-block in ubuntu.md (#7420)
+  * zlib is missing (#7428)
+  * Fixed unnecessary aticles and pronouns (#7466)
+  * Store SSL key and cert in site source (#7473)
+  * Fix typo in tutorial for converting existing site (#7524)
+  * Check if var exists before include tag (#7530)
+  * Clarify docs on collections regarding the need for front matter (#7538)
+  * Fix incorrect Windows path in themes.md (#7525)
+  * Addresses bundle not found. (#7351)
+  * Update the contribution docs for draft pull requests (#7619)
+  * Data file section adds TSV (#7640)
+  * Indicate where the _sass folder is by default (#7644)
+  * Docs: add version tags to new placeholders (#5981) for permalinks (#7647)
+  * Solve "GitHub Page build failure" in 10-deployment.md (#7648)
+  * fix link to Site Source config (#7708)
+  * Introduce frontmatter in step 2 (#7704)
+  * Add @ashmaroli to Core Team listing (#7398)
+  * Lnk to Tidelift in site's footer (#7377)
+  * Link to OpenCollective backing (#7378
+  * Link to sponsor listing in README (#7405)
+  * Adjust team page listings (#7395)
+  * Updates to CODE OF CONDUCT (v1.4.0) (#7105)
+  * More inclusive writing (#7283)
+  * Update Ruby version used in Travis-CI example (#7783)
+  * Documentation for binary operators in where_exp (#7786)
+  * Adding SmartForms as Forms service (#7794)
+
+### Site Enhancements
+
+  * Better Performance (#7388)
+  * Add some minor improvements to image loading in Showcase page (#7214)
+  * Simplify assigning classname to docs' aside-links (#7609)
+  * Simplify couple of includes in the docs site (#7607)
+  * Avoid generating empty classnames (#7610)
+  * Minimize rendering count (#7343)
+
+### Release
+
+  * Jekyll v4.0 release (#7782)
+  * Release post for v4.0.0 beta1 (#7716)
+  * Release post for v4.0.0.pre.alpha1 (#7574)
+  * Release post for v3.8.0 (#6849)
+  * Release post for v3.6.3, v3.7.4 and v3.8.4 (#7259)
+  * Post: v4.0 development (#6934)
+
+## 3.8.6 / 2019-07-02
+
+### Bug Fixes
+
+  * Update log output for an invalid theme directory (#7734)
+  * Memoize `SiteDrop#documents` to reduce allocations (#7722)
+  * Excerpt handling of custom and intermediate tags (#7467)
+  * Escape valid special chars in a site's path name (#7573)
+  * Revert memoizing `Site#docs_to_write` and refactor `#documents` (#7689)
+  * Fix broken `include_relative` usage in excerpt (#7690)
+  * Install platform-specific gems as required (3c06609406)
+
+### Security Fixes
+
+  * Theme gems: ensure directories aren't symlinks (#7424)
+
+## 3.8.5 / 2018-11-04
+
+### Bug Fixes
+
+  * Re-implement handling Liquid blocks in excerpts (#7250)
+
+## 3.8.4 / 2018-09-18
+
+### Bug Fixes
+
+  * 3.8.x: security: fix `include` bypass of `EntryFilter#filter` symlink check (#7228)
+
+## 3.8.3 / 2018-06-05
+
+### Bug Fixes
+
+  * Fix --unpublished not affecting collection documents (#7027)
+
+## 3.8.2 / 2018-05-18
+
+### Development Fixes
+
+  * Update rubocop version (#7016)
+
+### Bug Fixes
+
+  * Add whitespace control to LIQUID_TAG_REGEX (#7015)
 
 ## 3.8.1 / 2018-05-01
 
@@ -65,10 +679,10 @@
   * Minimize array allocations in the `where` filter (#6860)
   * Bump JRuby (#6878)
   * Assert existence of <collection>.files (#6907)
-  * Bump Rubocop to 0.54.x (#6915)
+  * Bump RuboCop to 0.54.x (#6915)
   * Regenerate unconditionally unless its an incremental build (#6917)
   * Centralize require statements (#6910)
-  * Bump to Rubocop 0.55 (#6929)
+  * Bump to RuboCop 0.55 (#6929)
   * Refactor private method `HighlightBlock#parse_options` (#6822)
 
 ### Minor Enhancements
@@ -139,6 +753,12 @@
   * Handle liquid tags in excerpts robustly (#6891)
   * Allow front matter defaults to be applied properly to documents gathered under custom `collections_dir` (#6885)
 
+## 3.7.4 / 2018-09-07
+
+### Bug Fixes
+
+  * Security: fix `include` bypass of EntryFilter#filter symlink check (#7224)
+
 ## 3.7.3 / 2018-02-25
 
 ### Bug Fixes
@@ -305,6 +925,12 @@
   * Improve docs styling for code to be run in shell (#6641)
   * Fix permalink icon markup in news-item layout (#6639)
 
+## 3.6.3 / 2018-09-18
+
+### Bug Fixes
+
+  * 3.6.x: security: fix `include` bypass of `EntryFilter#filter` symlink check (#7229)
+
 ## 3.6.2 / 2017-10-21
 
 ### Development Fixes
@@ -377,7 +1003,7 @@
   * add SUPPORT file for GitHub (#6324)
   * Rename CODE_OF_CONDUCT to show in banner (#6325)
   * Docs : illustrate page.id for a collection's document (#6329)
-  * Docs: post's date can be overriden in YAML front matter (#6334)
+  * Docs: post's date can be overriden in front matter (#6334)
   * Docs: `site.url` behavior on development and production environments (#6270)
   * Fix typo in site.url section of variables.md :-[ (#6337)
   * Docs: updates (#6343)
@@ -1043,7 +1669,7 @@
   * Fix typo on Chocolatey name in Windows documentation (#4686)
   * Use the correct URL, Fixes #4698 (#4699)
   * Add jekyll-paspagon plugin (#4700)
-  * Bold-italicize note in assets documentation about needing yaml front matter (#4706)
+  * Bold-italicize note in assets documentation about needing front matter (#4706)
   * Highlight the `script/` calls in the Contributing documentation (#4712)
   * Add Hawkins to the list of third-party plugins (#4755)
   * Fix a typo in pagination doc (#4763)
@@ -1211,7 +1837,7 @@
   * Drop: fix hash setter precedence (#4312)
   * utils: `has_yaml_header?` should accept files with extraneous spaces (#4290)
   * Escape html from site.title and page.title in site template (#4307)
-  * Allow custom file extensions if defined in `permalink` YAML front matter (#4314)
+  * Allow custom file extensions if defined in `permalink` front matter (#4314)
   * Fix deep_merge_hashes! handling of drops and hashes (#4359)
   * Page should respect output extension of its permalink (#4373)
   * Disable auto-regeneration when running server detached (#4376)
@@ -1414,7 +2040,7 @@
   * Internal: trigger hooks by owner symbol (#3871)
   * Update MIME types from mime-db (#3933)
   * Add header to site template `_config.yml` for clarity & direction (#3997)
-  * Site template: add timezone offset to post date frontmatter (#4001)
+  * Site template: add timezone offset to post date front matter (#4001)
   * Make a constant for the regex to find hidden files (#4032)
   * Site template: refactor github & twitter icons into includes (#4049)
   * Site template: add background to Kramdown Rouge-ified backtick code blocks (#4053)
@@ -1431,7 +2057,7 @@
   * Fix nav items alignment when on multiple rows (#3264)
   * Highlight: Only Strip Newlines/Carriage Returns, not Spaces (#3278)
   * Find variables in front matter defaults by searching with relative file path. (#2774)
-  * Allow variables (e.g `:categories`) in YAML front matter permalinks (#3320)
+  * Allow variables (e.g `:categories`) in front matter permalinks (#3320)
   * Handle nil URL placeholders in permalinks (#3325)
   * Template: Fix nav items alignment when in "burger" mode (#3329)
   * Template: Remove `!important` from nav SCSS introduced in #3329 (#3375)
@@ -1448,7 +2074,7 @@
   * Add WOFF2 font MIME type to Jekyll server MIME types (#3647)
   * Be smarter about extracting the extname in `StaticFile` (#3632)
   * Process metadata for all dependencies (#3608)
-  * Show error message if the YAML front matter on a page/post is invalid. (#3643)
+  * Show error message if the front matter on a page/post is invalid. (#3643)
   * Upgrade redcarpet to 3.2 (Security fix: OSVDB-120415) (#3652)
   * Create #mock_expects that goes directly to RSpec Mocks. (#3658)
   * Open `.jekyll-metadata` in binary mode to read binary Marshal data (#3713)
@@ -1526,7 +2152,7 @@
   * Add a Resources link to tutorial on building dynamic navbars (#3185)
   * Semantic structure improvements to the post and page layouts (#3251)
   * Add new AsciiDoc plugin to list of third-party plugins. (#3277)
-  * Specify that all transformable collection documents must contain YAML front matter (#3271)
+  * Specify that all transformable collection documents must contain front matter (#3271)
   * Assorted accessibility fixes (#3256)
   * Update configuration docs to mention `keep_files` for `destination` (#3288, #3296)
   * Break when we successfully generate nav link to save CPU cycles. (#3291)
@@ -1554,7 +2180,7 @@
   * Add a link on all the docs pages to "Improve this page". (#3510)
   * Add jekyll-auto-image generator to the list of third-party plugins (#3489)
   * Replace link to the proposed `picture` element spec (#3530)
-  * Add frontmatter date formatting information (#3469)
+  * Add front matter date formatting information (#3469)
   * Improve consistency and clarity of plugins options note (#3546)
   * Add permalink warning to pagination docs (#3551)
   * Fix grammar in Collections docs API stability warning (#3560)
@@ -2063,7 +2689,7 @@
   * Clean up the `<head>` in the site template (#2186)
   * Permit YAML blocks to end with three dots to better conform with the YAML spec (#2110)
   * Use `File.exist?` instead of deprecated `File.exists?` (#2214)
-  * Require newline after start of YAML Front Matter header (#2211)
+  * Require newline after start of front matter header (#2211)
   * Add the ability for pages to be marked as `published: false` (#1492)
   * Add `Jekyll::LiquidExtensions` with `.lookup_variable` method for easy looking up of variable values in a Liquid context. (#2253)
   * Remove literal lang name from class (#2292)
@@ -2741,7 +3367,7 @@
   * Bullet-proof `limit_posts` option (#1004)
   * Read in YAML as UTF-8 to accept non-ASCII chars (#836)
   * Fix the CLI option `--plugins` to actually accept dirs and files (#993)
-  * Allow 'excerpt' in YAML front matter to override the extracted excerpt (#946)
+  * Allow 'excerpt' in front matter to override the extracted excerpt (#946)
   * Fix cascade problem with site.baseurl, site.port and site.host. (#935)
   * Filter out directories with valid post names (#875)
   * Fix symlinked static files not being correctly built in unsafe mode (#909)
@@ -2753,7 +3379,7 @@
   * Patch for multibyte URI problem with `jekyll serve` (#723)
   * Order plugin execution by priority (#864)
   * Fixed Page#dir and Page#url for edge cases (#536)
-  * Fix broken `post_url` with posts with a time in their YAML front matter (#831)
+  * Fix broken `post_url` with posts with a time in their front matter (#831)
   * Look for plugins under the source directory (#654)
   * Tumblr Migrator: finds `_posts` dir correctly, fixes truncation of long post names (#775)
   * Force Categories to be Strings (#767)
@@ -2944,7 +3570,7 @@
 
   * Bug Fixes
   * Require redcloth >= 4.2.1 in tests (#92)
-  * Don't break on triple dashes in yaml front matter (#93)
+  * Don't break on triple dashes in front matter (#93)
 
 ### Minor Enhancements
 
@@ -2976,7 +3602,7 @@
   * Added --paginate option to the executable along with a paginator object for the payload (@calavera)
   * Upgraded RedCloth to 4.2.1, which makes `<notextile>` tags work once again.
   * Configuration options set in config.yml are now available through the site payload (@vilcans)
-  * Posts can now have an empty YAML front matter or none at all (@ bahuvrihi)
+  * Posts can now have an empty front matter or none at all (@ bahuvrihi)
   * Bug Fixes
   * Fixing Ruby 1.9 issue that requires `#to_s` on the err object (@Chrononaut)
   * Fixes for pagination and ordering posts on the same day (@ujh)
@@ -2984,7 +3610,7 @@
   * Index.html file should always have index.html permalink (@eugenebolshakov)
   * Added trailing slash to pretty permalink style so Apache is happy (@eugenebolshakov)
   * Bad markdown processor in config fails sooner and with better message (@ gcnovus)
-  * Allow CRLFs in yaml front matter (@juretta)
+  * Allow CRLFs in front matter (@juretta)
   * Added Date#xmlschema for Ruby versions < 1.9
 
 ## 0.5.1 / 2009-05-06
@@ -3063,7 +3689,7 @@
   * Added post categories based on directories containing `_posts` (@mreid)
   * Added post topics based on directories underneath `_posts`
   * Added new date filter that shows the full month name (@mreid)
-  * Merge Post's YAML front matter into its to_liquid payload (@remi)
+  * Merge Post's front matter into its to_liquid payload (@remi)
   * Restrict includes to regular files underneath `_includes`
   * Bug Fixes
   * Change YAML delimiter matcher so as to not chew up 2nd level markdown headers (@mreid)

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2008-2018 Tom Preston-Werner and Jekyll contributors
+Copyright (c) 2008-present Tom Preston-Werner and Jekyll contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.markdown

@@ -1,19 +1,15 @@
 # [Jekyll](https://jekyllrb.com/)
 
 [![Gem Version](https://img.shields.io/gem/v/jekyll.svg)][ruby-gems]
-[![Linux Build Status](https://img.shields.io/travis/jekyll/jekyll/master.svg?label=Linux%20build)][travis]
+[![Linux Build Status](https://github.com/jekyll/jekyll/workflows/Continuous%20Integration/badge.svg)][ci-workflow]
 [![Windows Build status](https://img.shields.io/appveyor/ci/jekyll/jekyll/master.svg?label=Windows%20build)][appveyor]
-[![Maintainability](https://api.codeclimate.com/v1/badges/8ba0cb5b17bb9848e128/maintainability)](codeclimate)
-[![Test Coverage](https://api.codeclimate.com/v1/badges/8ba0cb5b17bb9848e128/test_coverage)](coverage)
-[![Dependency Status](https://img.shields.io/gemnasium/jekyll/jekyll.svg)][gemnasium]
 [![Security](https://hakiri.io/github/jekyll/jekyll/master.svg)][hakiri]
+[![Backers on Open Collective](https://opencollective.com/jekyll/backers/badge.svg)](#backers)
+[![Sponsors on Open Collective](https://opencollective.com/jekyll/sponsors/badge.svg)](#sponsors)
 
 [ruby-gems]: https://rubygems.org/gems/jekyll
-[gemnasium]: https://gemnasium.com/jekyll/jekyll
-[codeclimate]: https://codeclimate.com/github/jekyll/jekyll
-[coverage]: https://codeclimate.com/github/jekyll/jekyll/coverage
 [hakiri]: https://hakiri.io/github/jekyll/jekyll/master
-[travis]: https://travis-ci.org/jekyll/jekyll
+[ci-workflow]: https://github.com/jekyll/jekyll/actions?query=workflow%3A%22Continuous+Integration%22+branch%3Amaster
 [appveyor]: https://ci.appveyor.com/project/jekyll/jekyll/branch/master
 
 Jekyll is a simple, blog-aware, static site generator perfect for personal, project, or organization sites. Think of it like a file-based CMS, without all the complexity. Jekyll takes your content, renders Markdown and Liquid templates, and spits out a complete, static website ready to be served by Apache, Nginx or another web server. Jekyll is the engine behind [GitHub Pages](https://pages.github.com), which you can use to host sites right from your GitHub repositories.
@@ -24,18 +20,28 @@ Jekyll does what you tell it to do — no more, no less. It doesn't try to outs
 
 See: https://jekyllrb.com/philosophy
 
-## Having trouble?
-
-See: https://jekyllrb.com/docs/troubleshooting/
-
 ## Getting Started
 
 * [Install](https://jekyllrb.com/docs/installation/) the gem
 * Read up about its [Usage](https://jekyllrb.com/docs/usage/) and [Configuration](https://jekyllrb.com/docs/configuration/)
-* Take a gander at some existing [Sites](https://wiki.github.com/jekyll/jekyll/sites)
+* Take a gander at some existing [Sites](https://github.com/jekyll/jekyll/wiki/sites)
 * [Fork](https://github.com/jekyll/jekyll/fork) and [Contribute](https://jekyllrb.com/docs/contributing/) your own modifications
 * Have questions? Check out our official forum community [Jekyll Talk](https://talk.jekyllrb.com/) or [`#jekyll` on irc.freenode.net](https://botbot.me/freenode/jekyll/)
 
+## Diving In
+
+* [Migrate](http://import.jekyllrb.com/docs/home/) from your previous system
+* Learn how [Front Matter](https://jekyllrb.com/docs/front-matter/) works
+* Put information on your site with [Variables](https://jekyllrb.com/docs/variables/)
+* Customize the [Permalinks](https://jekyllrb.com/docs/permalinks/) your posts are generated with
+* Use the built-in [Liquid Extensions](https://jekyllrb.com/docs/templates/) to make your life easier
+* Use custom [Plugins](https://jekyllrb.com/docs/plugins/) to generate content specific to your site
+* Watch [video tutorials from Giraffe Academy](https://jekyllrb.com/tutorials/video-walkthroughs/)
+
+## Need help?
+
+If you don't find the answer to your problem in our [docs](https://jekyllrb.com/docs/), or in the [troubleshooting section](https://jekyllrb.com/docs/troubleshooting/), ask the [community](https://jekyllrb.com/docs/community/) for help.
+
 ## Code of Conduct
 
 In order to have a more open and welcoming community, Jekyll adheres to a
@@ -45,16 +51,35 @@ conduct.
 Please adhere to this code of conduct in any interactions you have in the
 Jekyll community. It is strictly enforced on all official Jekyll
 repositories, websites, and resources. If you encounter someone violating
-these terms, please let one of our core team members [Olivia](mailto:olivia@jekyllrb.com?subject=Jekyll%20CoC%20Violation), [Pat](mailto:pat@jekyllrb.com?subject=Jekyll%20CoC%20Violation), [Matt](mailto:matt@jekyllrb.com?subject=Jekyll%20CoC%20Violation) or [Parker](mailto:parker@jekyllrb.com?subject=Jekyll%20CoC%20Violation) know and we will address it as soon as possible.
+these terms, please let one of our [core team members](https://jekyllrb.com/team/#core-team) know and we will address it as soon as possible.
 
-## Diving In
+## Credits
 
-* [Migrate](http://import.jekyllrb.com/docs/home/) from your previous system
-* Learn how the [YAML Front Matter](https://jekyllrb.com/docs/frontmatter/) works
-* Put information on your site with [Variables](https://jekyllrb.com/docs/variables/)
-* Customize the [Permalinks](https://jekyllrb.com/docs/permalinks/) your posts are generated with
-* Use the built-in [Liquid Extensions](https://jekyllrb.com/docs/templates/) to make your life easier
-* Use custom [Plugins](https://jekyllrb.com/docs/plugins/) to generate content specific to your site
+### Sponsors
+
+Support this project by becoming a sponsor. Your logo will show up in this README with a link to your website. [Become a sponsor!](https://opencollective.com/jekyll#sponsor)
+
+<a href="https://opencollective.com/jekyll/sponsor/0/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/0/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/1/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/1/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/2/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/2/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/3/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/3/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/4/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/4/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/5/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/5/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/6/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/6/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/7/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/7/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/8/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/8/avatar.svg" /></a>
+<a href="https://opencollective.com/jekyll/sponsor/9/website" target="_blank"><img src="https://opencollective.com/jekyll/sponsor/9/avatar.svg" /></a>
+
+### Contributors
+
+This project exists thanks to all the people who contribute.
+<a href="../../graphs/contributors"><img src="https://opencollective.com/jekyll/contributors.svg?width=890&button=false" /></a>
+
+### Backers
+
+Thank you to all our backers! 🙏 [Become a backer](https://opencollective.com/jekyll#backer)
+
+<a href="https://opencollective.com/jekyll#backers" target="_blank"><img src="https://opencollective.com/jekyll/backers.svg?width=890" /></a>
 
 ## License
 

Rakefile

@@ -159,5 +159,5 @@ end
 
 desc "Open an irb session preloaded with this library"
 task :console do
-  sh "irb -rubygems -r ./lib/#{name}.rb"
+  sh "irb -r ./lib/#{name}.rb"
 end

appveyor.yml

@@ -1,33 +1,32 @@
 version: "{build}"
 
-clone_depth: 10
+clone_depth: 5
 
 branches:
   only:
     - master
     - themes
+    - /.*-stable/
 
 build: off
 
-install:
-  - SET PATH=C:\Ruby%RUBY_FOLDER_VER%\bin;%PATH%
-  - bundle install --retry 5 --jobs=%NUMBER_OF_PROCESSORS% --clean --path vendor\bundle
-
 environment:
-  BUNDLE_WITHOUT: "benchmark:site:development"
+  BUNDLE_WITHOUT: "benchmark:development"
   matrix:
-    - RUBY_FOLDER_VER: "25"
+    - RUBY_FOLDER_VER: "26"
       TEST_SUITE: "test"
-    - RUBY_FOLDER_VER: "25"
-      TEST_SUITE: "cucumber"
-    - RUBY_FOLDER_VER: "25"
+    - RUBY_FOLDER_VER: "26"
       TEST_SUITE: "default-site"
-    - RUBY_FOLDER_VER: "25-x64"
-      TEST_SUITE: "test"
-    - RUBY_FOLDER_VER: "24"
-      TEST_SUITE: "test"
-    - RUBY_FOLDER_VER: "23"
-      TEST_SUITE: "test"
+    - RUBY_FOLDER_VER: "26"
+      TEST_SUITE: "profile-docs"
+    - RUBY_FOLDER_VER: "26"
+      TEST_SUITE: "memprof"
+    - RUBY_FOLDER_VER: "26"
+      TEST_SUITE: "cucumber"
+
+install:
+  - SET PATH=C:\Ruby%RUBY_FOLDER_VER%-x64\bin;%PATH%
+  - bundle install --retry 5 --jobs=%NUMBER_OF_PROCESSORS% --clean --path vendor\bundle
 
 test_script:
   - ruby --version
@@ -36,5 +35,5 @@ test_script:
   - bash ./script/cibuild
 
 cache:
-  # If one of the files after the right arrow changes, cache will be skipped
+  # If one of the files after the right arrow changes, cache will be invalidated
   - 'vendor\bundle -> appveyor.yml,Gemfile,jekyll.gemspec'

benchmark/find-filter-vs-where-first-filters.rb

@@ -0,0 +1,49 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'benchmark/ips'
+require_relative '../lib/jekyll'
+
+puts ''
+print 'Setting up... '
+
+SITE = Jekyll::Site.new(
+  Jekyll.configuration({
+    "source"             => File.expand_path("../docs", __dir__),
+    "destination"        => File.expand_path("../docs/_site", __dir__),
+    "disable_disk_cache" => true,
+    "quiet"              => true,
+  })
+)
+
+TEMPLATE_1 = Liquid::Template.parse(<<~HTML)
+  {%- assign doc = site.documents | where: 'url', '/docs/assets/' | first -%}
+  {{- doc.title -}}
+HTML
+
+TEMPLATE_2 = Liquid::Template.parse(<<~HTML)
+  {%- assign doc = site.documents | find: 'url', '/docs/assets/' -%}
+  {{- doc.title -}}
+HTML
+
+[:reset, :read, :generate].each { |phase| SITE.send(phase) }
+
+puts 'done.'
+puts 'Testing... '
+puts "  #{'where + first'.cyan} results in #{TEMPLATE_1.render(SITE.site_payload).inspect.green}"
+puts "  #{'find'.cyan} results in #{TEMPLATE_2.render(SITE.site_payload).inspect.green}"
+
+if TEMPLATE_1.render(SITE.site_payload) == TEMPLATE_2.render(SITE.site_payload)
+  puts 'Success! Procceding to run benchmarks.'.green
+  puts ''
+else
+  puts 'Something went wrong. Aborting.'.magenta
+  puts ''
+  return
+end
+
+Benchmark.ips do |x|
+  x.report('where + first') { TEMPLATE_1.render(SITE.site_payload) }
+  x.report('find') { TEMPLATE_2.render(SITE.site_payload) }
+  x.compare!
+end

benchmark/parse-include-tag-params.rb

@@ -0,0 +1,91 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# For pull request: https://github.com/jekyll/jekyll/pull/8192
+
+require 'benchmark/ips'
+require 'bundler/setup'
+require 'memory_profiler'
+require 'jekyll'
+
+CONTEXT = {"bar"=>"The quick brown fox"}
+MARKUP_1 = %Q(foo=bar lorem="ipsum \\"dolor\\"" alpha='beta \\'gamma\\'').freeze
+MARKUP_2 = %Q(foo=bar lorem="ipsum 'dolor'" alpha='beta "gamma"').freeze
+
+#
+
+def old_parse_params(markup)
+  params = {}
+
+  while (match = Jekyll::Tags::IncludeTag::VALID_SYNTAX.match(markup))
+    markup = markup[match.end(0)..-1]
+
+    value = if match[2]
+              match[2].gsub('\\"', '"')
+            elsif match[3]
+              match[3].gsub("\\'", "'")
+            elsif match[4]
+              CONTEXT[match[4]]
+            end
+
+    params[match[1]] = value
+  end
+  params
+end
+
+def new_parse_params(markup)
+  params = {}
+  markup.scan(Jekyll::Tags::IncludeTag::VALID_SYNTAX) do |key, d_quoted, s_quoted, variable|
+    value = if d_quoted
+              d_quoted.include?('\\"') ? d_quoted.gsub('\\"', '"') : d_quoted
+            elsif s_quoted
+              s_quoted.include?("\\'") ? s_quoted.gsub("\\'", "'") : s_quoted
+            elsif variable
+              CONTEXT[variable]
+            end
+
+    params[key] = value
+  end
+  params
+end
+
+#
+
+def report(label, markup, color)
+  prof_report = MemoryProfiler.report { yield }
+
+  allocated_memory  = prof_report.scale_bytes(prof_report.total_allocated_memsize)
+  allocated_objects = prof_report.total_allocated
+  retained_memory   = prof_report.scale_bytes(prof_report.total_retained_memsize)
+  retained_objects  = prof_report.total_retained
+
+  puts <<~MSG.send(color)
+    #{(label + " ").ljust(49, "-")}
+
+    MARKUP: #{markup}
+    RESULT: #{yield}
+
+    Total allocated: #{allocated_memory} (#{allocated_objects} objects)
+    Total retained:  #{retained_memory} (#{retained_objects} objects)
+  MSG
+end
+
+report('old w/ escaping', MARKUP_1, :magenta) { old_parse_params(MARKUP_1) }
+report('new w/ escaping', MARKUP_1, :cyan)    { new_parse_params(MARKUP_1) }
+
+report('old no escaping', MARKUP_2, :green)  { old_parse_params(MARKUP_2) }
+report('new no escaping', MARKUP_2, :yellow) { new_parse_params(MARKUP_2) }
+
+#
+
+Benchmark.ips do |x|
+  x.report("old + esc".magenta) { old_parse_params(MARKUP_1) }
+  x.report("new + esc".cyan)    { new_parse_params(MARKUP_1) }
+  x.compare!
+end
+
+Benchmark.ips do |x|
+  x.report("old - esc".green)  { old_parse_params(MARKUP_2) }
+  x.report("new - esc".yellow) { new_parse_params(MARKUP_2) }
+  x.compare!
+end

benchmark/path-manager.rb

@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+require 'benchmark/ips'
+require 'jekyll'
+
+class FooPage
+  def initialize(dir:, name:)
+    @dir = dir
+    @name = name
+  end
+
+  def slow_path
+    File.join(*[@dir, @name].map(&:to_s).reject(&:empty?)).sub(%r!\A/!, "")
+  end
+
+  def fast_path
+    Jekyll::PathManager.join(@dir, @name).sub(%r!\A/!, "")
+  end
+end
+
+nil_page     = FooPage.new(:dir => nil, :name => nil)
+empty_page   = FooPage.new(:dir => "", :name => "")
+root_page    = FooPage.new(:dir => "", :name => "ipsum.md")
+nested_page  = FooPage.new(:dir => "lorem", :name => "ipsum.md")
+slashed_page = FooPage.new(:dir => "/lorem/", :name => "/ipsum.md")
+
+if nil_page.slow_path == nil_page.fast_path
+  Benchmark.ips do |x|
+    x.report('nil_page slow') { nil_page.slow_path }
+    x.report('nil_page fast') { nil_page.fast_path }
+    x.compare!
+  end
+end
+
+if empty_page.slow_path == empty_page.fast_path
+  Benchmark.ips do |x|
+    x.report('empty_page slow') { empty_page.slow_path }
+    x.report('empty_page fast') { empty_page.fast_path }
+    x.compare!
+  end
+end
+
+if root_page.slow_path == root_page.fast_path
+  Benchmark.ips do |x|
+    x.report('root_page slow') { root_page.slow_path }
+    x.report('root_page fast') { root_page.fast_path }
+    x.compare!
+  end
+end
+
+if nested_page.slow_path == nested_page.fast_path
+  Benchmark.ips do |x|
+    x.report('nested_page slow') { nested_page.slow_path }
+    x.report('nested_page fast') { nested_page.fast_path }
+    x.compare!
+  end
+end
+
+if slashed_page.slow_path == slashed_page.fast_path
+  Benchmark.ips do |x|
+    x.report('slashed_page slow') { slashed_page.slow_path }
+    x.report('slashed_page fast') { slashed_page.fast_path }
+    x.compare!
+  end
+end

benchmark/schwartzian_transform.rb

@@ -90,26 +90,21 @@ end
 Correctness.new(site_docs, "redirect_from".freeze).assert!
 Correctness.new(site_docs, "title".freeze).assert!
 
-# First, test with a property only a handful of documents have.
-Benchmark.ips do |x|
-  x.config(time: 10, warmup: 5)
-  x.report('sort_by_property_directly with sparse property') do
-    sort_by_property_directly(site_docs, "redirect_from".freeze)
+def test_property(property, meta_key)
+  Benchmark.ips do |x|
+    x.config(time: 10, warmup: 5)
+    x.report("sort_by_property_directly with #{property} property") do
+      sort_by_property_directly(site_docs, meta_key)
+    end
+    x.report("schwartzian_transform with #{property} property") do
+      schwartzian_transform(site_docs, meta_key)
+    end
+    x.compare!
   end
-  x.report('schwartzian_transform with sparse property') do
-    schwartzian_transform(site_docs, "redirect_from".freeze)
-  end
-  x.compare!
 end
 
+# First, test with a property only a handful of documents have.
+test_property('sparse', 'redirect_from')
+
 # Next, test with a property they all have.
-Benchmark.ips do |x|
-  x.config(time: 10, warmup: 5)
-  x.report('sort_by_property_directly with non-sparse property') do
-    sort_by_property_directly(site_docs, "title".freeze)
-  end
-  x.report('schwartzian_transform with non-sparse property') do
-    schwartzian_transform(site_docs, "title".freeze)
-  end
-  x.compare!
-end
+test_property('non-sparse', 'title')

benchmark/static-drop-vs-forwarded.rb

@@ -0,0 +1,83 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "forwardable"
+require "colorator"
+require "liquid"
+require "benchmark/ips"
+require "memory_profiler"
+
+# Set up (memory) profiler
+
+class Profiler
+  def self.run
+    yield new(ARGV[0] || 10_000)
+  end
+
+  def initialize(count)
+    @count = count.to_i
+  end
+
+  def report(label, color, &block)
+    prof_report = MemoryProfiler.report { @count.to_i.times(&block) }
+
+    allocated_memory  = prof_report.scale_bytes(prof_report.total_allocated_memsize)
+    allocated_objects = prof_report.total_allocated
+    retained_memory   = prof_report.scale_bytes(prof_report.total_retained_memsize)
+    retained_objects  = prof_report.total_retained
+
+    puts <<~MSG.send(color)
+      With #{label} calls
+
+      Total allocated: #{allocated_memory} (#{allocated_objects} objects)
+      Total retained:  #{retained_memory} (#{retained_objects} objects)
+    MSG
+  end
+end
+
+# Set up stage
+
+class Drop < Liquid::Drop
+  def initialize(obj)
+    @obj = obj
+  end
+end
+
+class ForwardDrop < Drop
+  extend Forwardable
+  def_delegators :@obj, :name
+end
+
+class StaticDrop < Drop
+  def name
+    @obj.name
+  end
+end
+
+class Document
+  def name
+    "lipsum"
+  end
+end
+
+# Set up actors
+
+document = Document.new
+alpha    = ForwardDrop.new(document)
+beta     = StaticDrop.new(document)
+count    = ARGV[0] || 10_000
+
+# Run profilers
+puts "\nMemory profiles for #{count} calls to invoke drop key:"
+Profiler.run do |x|
+  x.report("forwarded", :cyan) { alpha["name"] }
+  x.report("static", :green) { beta["name"] }
+end
+
+# Benchmark
+puts "\nBenchmarking the two scenarios..."
+Benchmark.ips do |x|
+  x.report("forwarded".cyan) { alpha["name"] }
+  x.report("static".green) { beta["name"] }
+  x.compare!
+end

docs/.gitignore

@@ -1,5 +1,5 @@
 _site/
+.idea/
 *.swp
 pkg/
 test/
-.idea/

docs/_config.yml

@@ -1,5 +1,5 @@
 ---
-version: 3.8.1
+version: 4.2.0
 name: Jekyll • Simple, blog-aware, static sites
 description: Transform your plain text into static websites and blogs
 url: https://jekyllrb.com
@@ -10,6 +10,7 @@ twitter:
 logo: "/img/logo-2x.png"
 google_analytics_id: UA-50755011-1
 google_site_verification: onQcXpAvtHBrUI5LlroHNE_FP0b2qvFyPq7VZw36iEY
+cloudinary_url: https://res.cloudinary.com/jekyll/image/upload/f_auto,q_auto,w_404
 collections:
   docs:
     permalink: "/:collection/:path/"
@@ -18,6 +19,7 @@ collections:
     permalink: "/news/:year/:month/:day/:title/"
     output: true
   tutorials:
+    permalink: "/:collection/:path/"
     output: true
 defaults:
 - scope:
@@ -30,7 +32,16 @@ defaults:
     type: posts
   values:
     layout: news_item
-    image: "/img/twitter-card.png"
+- scope:
+    path: _tutorials
+    type: tutorials
+  values:
+    layout: tutorials
+- scope:
+    path: ''
+  values:
+    image: "/img/jekyll-og.png"
+future: true
 plugins:
 - jekyll-avatar
 - jekyll-feed
@@ -39,10 +50,15 @@ plugins:
 - jekyll-seo-tag
 - jekyll-sitemap
 - jemoji
+feed:
+  categories:
+  - release
+kramdown:
+  syntax_highlighter_opts:
+    default_lang: plaintext
 sass:
   style: compressed
+strict_front_matter: true
 exclude:
-- ".gitignore"
-- CNAME
 - icomoon-selection.json
 - readme.md

docs/_data/config_options/build.yml

@@ -0,0 +1,110 @@
+- name: Regeneration
+  description: Enable auto-regeneration of the site when files are modified.
+  flag: "-w, --[no-]watch"
+
+
+- name: Configuration
+  description: >-
+    Specify config files instead of using <code>_config.yml</code> automatically.
+    Settings in later files override settings in earlier files.
+  flag: "--config FILE1[,FILE2,...]"
+
+
+- name: Plugins
+  description: >-
+    Specify plugin directories instead of using <code>_plugins/</code> automatically.
+  option: "plugins_dir: [ DIR1,... ]"
+  flag: "-p, --plugins DIR1[,DIR2,...]"
+
+
+- name: Layouts
+  description: >-
+    Specify layout directory instead of using <code>_layouts/</code> automatically.
+  option: "layout_dir: DIR"
+  flag: --layouts DIR
+
+
+- name: Drafts
+  description: Process and render draft posts.
+  option: "show_drafts: BOOL"
+  flag: -D, --drafts
+
+
+- name: Environment
+  description: Use a specific environment value in the build.
+  flag: JEKYLL_ENV=production
+
+
+- name: Future
+  description: Publish posts or collection documents with a future date.
+  option: "future: BOOL"
+  flag: --future
+
+
+- name: Unpublished
+  description: Render posts that were marked as unpublished.
+  option: "unpublished: BOOL"
+  flag: --unpublished
+
+
+- name: LSI
+  description: >-
+    Produce an index for related posts. Requires the
+    <a href="https://jekyll.github.io/classifier-reborn/">classifier-reborn</a> plugin.
+  option: "lsi: BOOL"
+  flag: --lsi
+
+
+- name: Limit Posts
+  description: Limit the number of posts to parse and publish.
+  option: "limit_posts: NUM"
+  flag: --limit_posts NUM
+
+
+- name: Force polling
+  description: Force watch to use polling.
+  option: "force_polling: BOOL"
+  flag: --force_polling
+
+
+- name: Verbose output
+  description: Print verbose output.
+  flag: -V, --verbose
+
+
+- name: Silence Output
+  description: Silence the normal output from Jekyll during a build.
+  flag: -q, --quiet
+
+
+- name: Incremental build
+  description: >-
+    Enable the experimental incremental build feature. Incremental build only
+    re-builds posts and pages that have changed, resulting in significant performance
+    improvements for large sites, but may also break site generation in certain
+    cases.
+  option: "incremental: BOOL"
+  flag: -I, --incremental
+
+
+- name: Liquid profiler
+  description: Generate a Liquid rendering profile to help you identify performance bottlenecks.
+  option: "profile: BOOL"
+  flag: --profile
+
+
+- name: Strict Front Matter
+  description: Cause a build to fail if there is a YAML syntax error in a page's front matter.
+  option: "strict_front_matter: BOOL"
+  flag: --strict_front_matter
+
+
+- name: Base URL
+  description: Serve the website from the given base URL.
+  option: "baseurl: URL"
+  flag: -b, --baseurl URL
+
+
+- name: Trace
+  description: Show the full backtrace when an error occurs.
+  flag: -t, --trace

docs/_data/config_options/global.yml

@@ -0,0 +1,77 @@
+- name: Site Source
+  description: Change the directory where Jekyll will read files
+  option: "source: DIR"
+  flag: -s, --source DIR
+
+
+- name: Site Destination
+  description: Change the directory where Jekyll will write files
+  option: "destination: DIR"
+  flag: -d, --destination DIR
+
+
+- name: Safe
+  description: >-
+    Disable <a href="/docs/plugins/">non-whitelisted plugins</a>, caching to disk, and ignore symbolic links.
+  option: "safe: BOOL"
+  flag: --safe
+
+
+- name: Disable Disk Cache
+  version-badge: 4.1.0
+  description: >-
+    Disable caching of content to disk in order to skip creating a <code>.jekyll-cache</code> or similar directory at
+    the source to avoid interference with virtual environments and third-party directory watchers. Caching to disk is
+    always disabled in <code>safe</code> mode.
+  option: "disable_disk_cache: BOOL"
+  flag: --disable-disk-cache
+
+
+- name: Ignore theme configuration
+  version-badge: 4.1.0
+  description: >-
+    Jekyll 4.0 started allowing themes to bundle a <code>_config.yml</code> to simplify theme-onboarding for new users.
+    In the unfortunate situation that importing a bundled theme configuration messes up the merged site-configuration,
+    the user can configure Jekyll to not import the theme-config entirely.
+  option: "ignore_theme_config: BOOL"
+
+
+- name: Exclude
+  description: >-
+    Exclude directories and/or files from the conversion. These exclusions are relative to the site's source directory
+    and cannot be outside the source directory.
+  option: "exclude: [DIR, FILE, ...]"
+
+
+- name: Include
+  description: >-
+    Force inclusion of directories and/or files in the conversion. <code>.htaccess</code> is a good example since
+    dotfiles are excluded by default.
+  option: "include: [DIR, FILE, ...]"
+
+
+- name: Keep files
+  description: >-
+    When clobbering the site destination, keep the selected files. Useful for files that are not generated by jekyll;
+    e.g. files or assets that are generated by your build tool. The paths are relative to the <code>destination</code>.
+  option: "keep_files: [DIR, FILE, ...]"
+
+
+- name: Time Zone
+  description: >-
+    Set the time zone for site generation. This sets the <code>TZ</code> environment variable, which Ruby uses to handle
+    time and date creation and manipulation. Any entry from the
+    <a href="https://en.wikipedia.org/wiki/Tz_database">IANA Time Zone Database</a>
+    is valid, e.g. <code>America/New_York</code>. A list of all available values can be found
+    <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones"> here</a>.
+    When serving on a local machine, the default time zone is set by your operating system. But when served on a remote
+    host/server, the default time zone depends on the server's setting or location.
+  option: "timezone: TIMEZONE"
+
+
+- name: Encoding
+  description: >-
+    Set the encoding of files by name (only available for Ruby 1.9 or later). The default value is <code>utf-8</code>
+    starting in 2.0.0, and <code>nil</code> before 2.0.0, which will yield the Ruby default of <code>ASCII-8BIT</code>.
+    Available encodings can be shown by the command <code>ruby -e 'puts Encoding::list.join("\n")'</code>.
+  option: "encoding: ENCODING"

docs/_data/config_options/serve.yml

@@ -0,0 +1,71 @@
+- name: Local Server Port
+  description: Listen on the given port.
+  option: "port: PORT"
+  flag: "-P, --port PORT"
+
+
+- name: Local Server Hostname
+  description: Listen at the given hostname.
+  option: "host: HOSTNAME"
+  flag: "-H, --host HOSTNAME"
+
+
+- name: Live Reload
+  description: Reload a page automatically on the browser when its content is edited.
+  option: "livereload: BOOL"
+  flag: "-l, --livereload"
+
+
+- name: Live Reload Ignore
+  description: File glob patterns for LiveReload to ignore.
+  option: "livereload_ignore: [ GLOB1,... ]"
+  flag: "--livereload-ignore GLOB1[,GLOB2,...]"
+
+
+- name: Live Reload Min/Max Delay
+  description: Minimum/Maximum delay before automatically reloading page.
+  options:
+    - "livereload_min_delay: SECONDS"
+    - "livereload_max_delay: SECONDS"
+  flags:
+    - "--livereload-min-delay SECONDS"
+    - "--livereload-max-delay SECONDS"
+
+
+- name: Live Reload Port
+  description: Port for LiveReload to listen on.
+  flag: "--livereload-port PORT"
+
+
+- name: Open URL
+  description: Open the site's URL in the browser.
+  option: "open_url: BOOL"
+  flag: "-o, --open-url"
+
+
+- name: Detach
+  description: Detach the server from the terminal.
+  option: "detach: BOOL"
+  flag: "-B, --detach"
+
+
+- name: Skips the initial site build
+  description: Skips the initial site build which occurs before the server is started.
+  option: "skip_initial_build: BOOL"
+  flag: "--skip-initial-build"
+
+
+- name: Show Directory Listing
+  description: Show a directory listing instead of loading your index file.
+  option: "show_dir_listing: BOOL"
+  flag: "--show-dir-listing"
+
+
+- name: X.509 (SSL) Private Key
+  description: "SSL Private Key, stored or symlinked in the site source."
+  flag: "--ssl-key"
+
+
+- name: X.509 (SSL) Certificate
+  description: "SSL Public certificate, stored or symlinked in the site source."
+  flag: "--ssl-cert"

docs/_data/docs.yml

@@ -1,53 +0,0 @@
-- title: Getting Started
-  docs:
-  - home
-  - quickstart
-  - installation
-  - windows
-  - usage
-  - structure
-  - configuration
-
-- title: Your Content
-  docs:
-  - frontmatter
-  - posts
-  - drafts
-  - pages
-  - static-files
-  - variables
-  - collections
-  - datafiles
-  - assets
-  - migrations
-
-- title: Customization
-  docs:
-  - templates
-  - includes
-  - permalinks
-  - pagination
-  - plugins
-  - themes
-  - extras
-
-- title: Deployment
-  docs:
-  - github-pages
-  - deployment-methods
-  - continuous-integration
-
-- title: Miscellaneous
-  docs:
-  - troubleshooting
-  - sites
-  - resources
-  - upgrading/0-to-2
-  - upgrading/2-to-3
-
-- title: Meta
-  docs:
-  - contributing
-  - maintaining
-  - conduct
-  - history

docs/_data/docs_nav.yml

@@ -0,0 +1,37 @@
+- title: Getting Started
+  docs:
+    - link: /docs/
+    - link: /docs/installation/
+    - link: /docs/ruby-101/
+    - link: /docs/community/
+    - link: /docs/step-by-step/01-setup/
+- title: Build
+  docs:
+    - link: /docs/usage/
+    - link: /docs/configuration/
+    - link: /docs/rendering-process/
+- title: Content
+  docs:
+    - link: /docs/pages/
+    - link: /docs/posts/
+    - link: /docs/front-matter/
+    - link: /docs/collections/
+    - link: /docs/datafiles/
+    - link: /docs/assets/
+    - link: /docs/static-files/
+- title: Site Structure
+  docs:
+    - link: /docs/structure/
+    - link: /docs/liquid/
+    - link: /docs/variables/
+    - link: /docs/includes/
+    - link: /docs/layouts/
+    - link: /docs/permalinks/
+    - link: /docs/themes/
+    - link: /docs/pagination/
+- title: Guides
+  docs:
+    - link: /docs/plugins/
+    - link: /docs/migrations/
+    - link: /docs/upgrading/
+    - link: /docs/deployment/

docs/_data/jekyll_filters.yml

@@ -0,0 +1,347 @@
+#
+# ---------------------------------------------------------------------------------------
+# List of Liquid Filters provided by Jekyll Core that will be utilized for their
+# documentation.
+#
+# To document a new filter, create a new "list-item" below with the following keys:
+#   name:           : [REQUIRED] A string label that identifies the filter
+#   description:    : [REQUIRED] A short description of what to expect from the filter
+#   version_badge:  : [OPTIONAL] Jekyll version that introduced the filter
+#   examples:       : [REQUIRED] A 'nested list' comprised of inputs and outputs
+#     input:        : [REQUIRED] The filter syntax and usage
+#     output:       : [OPTIONAL] The output from the filter
+#
+# Tip: Use YAML Block notations to "fold" a long string, or to "break" a long string
+#      to the following line. Block notations can also be used to avoid having to use
+#      backslashes to escape quotes.
+# ---------------------------------------------------------------------------------------
+#
+- name: Relative URL
+  description: >-
+    Prepend the <code>baseurl</code> value to the input. Useful if
+    your site is hosted at a subpath rather than the root of the domain.
+  examples:
+    - input: '{{ "/assets/style.css" | relative_url }}'
+      output: '/my-baseurl/assets/style.css'
+
+#
+
+- name: Absolute URL
+  description: Prepend the <code>url</code> and <code>baseurl</code> value to the input.
+  examples:
+    - input: '{{ "/assets/style.css" | absolute_url }}'
+      output: 'http://example.com/my-baseurl/assets/style.css'
+
+#
+
+- name: Date to XML Schema
+  description: Convert a Date into XML Schema (ISO 8601) format.
+  examples:
+    - input: '{{ site.time | date_to_xmlschema }}'
+      output: '2008-11-07T13:07:54-08:00'
+
+#
+
+- name: Date to RFC-822 Format
+  description: Convert a Date into the RFC-822 format used for RSS feeds.
+  examples:
+    - input: '{{ site.time | date_to_rfc822 }}'
+      output: 'Mon, 07 Nov 2008 13:07:54 -0800'
+
+#
+
+- name: Date to String
+  description: Convert a date to short format.
+  examples:
+    - input: '{{ site.time | date_to_string }}'
+      output: '07 Nov 2008'
+
+#
+
+- name: Date to String in ordinal US style
+  description: 'Format a date to ordinal, US, short format.'
+  version_badge: 3.8.0
+  examples:
+    - input: '{{ site.time | date_to_string: "ordinal", "US" }}'
+      output: 'Nov 7th, 2008'
+
+#
+
+- name: Date to Long String
+  description: Format a date to long format.
+  examples:
+    - input: '{{ site.time | date_to_long_string }}'
+      output: '07 November 2008'
+
+#
+
+- name: Date to Long String in ordinal UK style
+  description: 'Format a date to ordinal, UK, long format.'
+  version_badge: 3.8.0
+  examples:
+    - input: '{{ site.time | date_to_long_string: "ordinal" }}'
+      output: '7th November 2008'
+
+#
+
+- name: Where
+  description: Select all the objects in an array where the key has the given value.
+  examples:
+    - input: '{{ site.members | where:"graduation_year","2014" }}'
+      output:
+
+#
+
+- name: Where Expression
+  description: Select all the objects in an array where the expression is true.
+  version_badge: 3.2.0
+  examples:
+    - input: |-
+        {{ site.members | where_exp:"item",
+        "item.graduation_year == 2014" }}
+      output:
+    - input: |-
+        {{ site.members | where_exp:"item",
+        "item.graduation_year < 2014" }}
+      output:
+    - input: |-
+        {{ site.members | where_exp:"item",
+        "item.projects contains 'foo'" }}
+      output:
+
+#
+
+- name: Find
+  description: >-
+    Return <strong>the first object</strong> in an array for which the queried
+    attribute has the given value or return <code>nil</code> if no item in
+    the array satisfies the given criteria.
+  version_badge: 4.1.0
+  examples:
+    - input: '{{ site.members | find: "graduation_year", "2014" }}'
+      output:
+
+#
+
+- name: Find Expression
+  description: >-
+    Return <strong>the first object</strong> in an array for which the given
+    expression evaluates to true or return <code>nil</code> if no item in
+    the array satisfies the evaluated expression.
+  version_badge: 4.1.0
+  examples:
+    - input: |-
+        {{ site.members | find_exp:"item",
+        "item.graduation_year == 2014" }}
+      output:
+    - input: |-
+        {{ site.members | find_exp:"item",
+        "item.graduation_year < 2014" }}
+      output:
+    - input: |-
+        {{ site.members | find_exp:"item",
+        "item.projects contains 'foo'" }}
+      output:
+
+#
+
+- name: Group By
+  description: Group an array's items by a given property.
+  examples:
+    - input: '{{ site.members | group_by:"graduation_year" }}'
+      output: |-
+        [{"name"=>"2013", "items"=>[...]},
+        {"name"=>"2014", "items"=>[...]}]
+
+#
+
+- name: Group By Expression
+  description: Group an array's items using a Liquid expression.
+  version_badge: 3.4.0
+  examples:
+    - input: |-
+        {{ site.members | group_by_exp: "item",
+        "item.graduation_year | truncate: 3, ''" }}
+      output: |-
+        [{"name"=>"201", "items"=>[...]},
+        {"name"=>"200", "items"=>[...]}]
+
+#
+
+- name: XML Escape
+  description: Escape some text for use in XML.
+  examples:
+    - input: '{{ page.content | xml_escape }}'
+      output:
+
+#
+
+- name: CGI Escape
+  description: >-
+    CGI escape a string for use in a URL. Replaces any special characters
+    with appropriate <code>%XX</code> replacements. CGI escape normally
+    replaces a space with a plus <code>+</code> sign.
+  examples:
+    - input: '{{ "foo, bar; baz?" | cgi_escape }}'
+      output: 'foo%2C+bar%3B+baz%3F'
+
+#
+
+- name: URI Escape
+  description: >-
+    Percent encodes any special characters in a URI.
+    URI escape normally replaces a space with <code>%20</code>.
+    <a href="https://en.wikipedia.org/wiki/Percent-encoding#Types_of_URI_characters">Reserved characters</a>
+    will not be escaped.
+  examples:
+    - input: '{{ "http://foo.com/?q=foo, \bar?" | uri_escape }}'
+      output: 'http://foo.com/?q=foo,%20%5Cbar?'
+
+#
+
+- name: Number of Words
+  description: >-
+    Count the number of words in some text.<br/>
+    From <span class="version-badge">v4.1.0</span>, this filter takes an optional
+    argument to control the handling of Chinese-Japanese-Korean (CJK) characters
+    in the <code>input</code> string.<br/>
+    Passing <code>'cjk'</code> as the argument will count every CJK character
+    detected as one word irrespective of being separated by whitespace.<br/>
+    Passing <code>'auto'</code> (auto-detect) works similar to <code>'cjk'</code>
+    but is more performant if the filter is used on a variable string that may
+    or may not contain CJK chars.
+  examples:
+    - input: '{{ "Hello world!" | number_of_words }}'
+      output: 2
+    - input: '{{ "你好hello世界world" | number_of_words }}'
+      output: 1
+    - input: '{{ "你好hello世界world" | number_of_words: "cjk" }}'
+      output: 6
+    - input: '{{ "你好hello世界world" | number_of_words: "auto" }}'
+      output: 6
+
+#
+
+- name: Array to Sentence
+  description: >-
+    Convert an array into a sentence. Useful for listing tags.
+    Optional argument for connector.
+  examples:
+    - input: '{{ page.tags | array_to_sentence_string }}'
+      output: 'foo, bar, and baz'
+    - input: '{{ page.tags | array_to_sentence_string: "or" }}'
+      output: 'foo, bar, or baz'
+
+#
+
+- name: Markdownify
+  description: Convert a Markdown-formatted string into HTML.
+  examples:
+    - input: '{{ page.excerpt | markdownify }}'
+      output:
+
+#
+
+- name: Smartify
+  description: 'Convert "quotes" into &ldquo;smart quotes.&rdquo;'
+  examples:
+    - input: '{{ page.title | smartify }}'
+      output:
+
+#
+
+- name: Converting Sass/SCSS
+  description: Convert a Sass- or SCSS-formatted string into CSS.
+  examples:
+    - input: '{{ some_sass | sassify }}'
+      output:
+    - input: '{{ some_scss | scssify }}'
+      output:
+
+#
+
+- name: Slugify
+  description: Convert a string into a lowercase URL "slug". See below for options.
+  examples:
+    - input: '{{ "The _config.yml file" | slugify }}'
+      output: 'the-config-yml-file'
+    - input: '{{ "The _config.yml file" | slugify: "pretty" }}'
+      output: 'the-_config.yml-file'
+    - input: '{{ "The _cönfig.yml file" | slugify: "ascii" }}'
+      output: 'the-c-nfig-yml-file'
+    - input: '{{ "The cönfig.yml file" | slugify: "latin" }}'
+      output: 'the-config-yml-file'
+
+#
+
+- name: Data To JSON
+  description: Convert Hash or Array to JSON.
+  examples:
+    - input: '{{ site.data.projects | jsonify }}'
+      output:
+
+#
+
+- name: Normalize Whitespace
+  description: Replace any occurrence of whitespace with a single space.
+  examples:
+    - input: '{{ "a \n b" | normalize_whitespace }}'
+      output:
+
+#
+
+- name: Sort
+  description: >-
+    Sort an array. Optional arguments for hashes
+    1.&nbsp;property name
+    2.&nbsp;nils order (<em>first</em> or <em>last</em>).
+  examples:
+    - input: '{{ page.tags | sort }}'
+      output:
+    - input: '{{ site.posts | sort: "author" }}'
+      output:
+    - input: '{{ site.pages | sort: "title", "last" }}'
+      output:
+
+#
+
+- name: Sample
+  description: 'Pick a random value from an array. Optionally, pick multiple values.'
+  examples:
+    - input: '{{ site.pages | sample }}'
+      output:
+    - input: '{{ site.pages | sample: 2 }}'
+      output:
+
+#
+
+- name: To Integer
+  description: Convert a string or boolean to integer.
+  examples:
+    - input: '{{ some_var | to_integer }}'
+      output:
+
+#
+
+- name: Array Filters
+  description: >-
+    Push, pop, shift, and unshift elements from an Array.
+    These are <strong>NON-DESTRUCTIVE</strong>, i.e. they do not mutate the array,
+    but rather make a copy and mutate that.
+  examples:
+    - input: '{{ page.tags | push: "Spokane" }}'
+      output: '["Seattle", "Tacoma", "Spokane"]'
+    - input: '{{ page.tags | pop }}'
+      output: '["Seattle"]'
+    - input: '{{ page.tags | shift }}'
+      output: '["Tacoma"]'
+    - input: '{{ page.tags | unshift: "Olympia" }}'
+      output: '["Olympia", "Seattle", "Tacoma"]'
+
+#
+
+- name: Inspect
+  description: Convert an object into its String representation for debugging.
+  examples:
+    - input: '{{ some_var | inspect }}'
+      output:

docs/_data/jekyll_variables.yml

@@ -0,0 +1,175 @@
+# Variables provided by Jekyll core
+#
+#   name:           : name of the variable
+#   description:    : content returned by the varialble
+
+global:
+  - name: site
+    description: >-
+      Site wide information + configuration settings from <code>_config.yml</code>.
+      See below for details.
+  - name: page
+    description: >-
+      Page specific information + the <a href="/docs/front-matter/">front matter</a>.
+      Custom variables set via the front matter will be available here. See below for details.
+  - name: layout
+    description: >-
+      Layout specific information + the <a href="/docs/front-matter/">front matter</a>.
+      Custom variables set via front matter in layouts will be available here.
+  - name: content
+    description: >-
+      In layout files, the rendered content of the Post or Page being wrapped.
+      Not defined in Post or Page files.
+  - name: paginator
+    description: >-
+      When the <code>paginate</code> configuration option is set, this variable becomes available
+      for use. See <a href="../pagination/">Pagination</a> for details.
+
+site:
+  - name: site.time
+    description: >-
+      The current time (when you run the <code>jekyll</code> command).
+  - name: site.pages
+    description: >-
+      A list of all Pages.
+  - name: site.posts
+    description: >-
+      A reverse chronological list of all Posts.
+  - name: site.related_posts
+    description: >-
+      If the page being processed is a Post, this contains a list of up to ten related Posts.
+      By default, these are the ten most recent posts. For high quality but slow to compute
+      results, run the <code>jekyll</code> command with the <code>--lsi</code>
+      (<a href="https://en.wikipedia.org/wiki/Latent_semantic_analysis#Latent_semantic_indexing">latent semantic indexing</a>)
+      option. Also note GitHub Pages does not support the
+      <code>lsi</code> option when generating sites.
+  - name: site.static_files
+    description: >-
+      A list of all <a href="/docs/static-files/">static files</a> (i.e.
+      files not processed by Jekyll's converters or the Liquid renderer).
+      Each file has five properties: <code>path</code>, <code>modified_time</code>,
+      <code>name</code>, <code>basename</code> and <code>extname</code>.
+  - name: site.html_pages
+    description: >-
+      A subset of <code>site.pages</code> listing those which end in <code>.html</code>.
+  - name: site.html_files
+    description: >-
+      A subset of <code>site.static_files</code> listing those which end in <code>.html</code>.
+  - name: site.collections
+    description: >-
+      A list of all the collections (including posts).
+  - name: site.data
+    description: >-
+      A list containing the data loaded from the YAML files located in the <code>_data</code>
+      directory.
+  - name: site.documents
+    description: >-
+      A list of all the documents in every collection.
+  - name: site.categories.CATEGORY
+    description: >-
+      The list of all Posts in category <code>CATEGORY</code>.
+  - name: site.tags.TAG
+    description: >-
+      The list of all Posts with tag <code>TAG</code>.
+  - name: site.url
+    description: >-
+      Contains the url of your site as it is configured in the <code>_config.yml</code>.
+      For example, if you have <code>url: http://mysite.com</code> in your configuration file,
+      then it will be accessible in Liquid as <code>site.url</code>. For the development
+      environment there is <a href="/news/#3-siteurl-is-set-by-the-development-server">an
+      exception</a>, if you are running <code>jekyll serve</code> in a development environment
+      <code>site.url</code> will be set to the value of <code>host</code>, <code>port</code>,
+      and SSL-related options. This defaults to <code>url: http://localhost:4000</code>.
+  - name: "site.[CONFIGURATION_DATA]"
+    description: >-
+      All the variables set via the command line and your <code>_config.yml</code> are available
+      through the <code>site</code> variable. For example, if you have <code>foo: bar</code> in
+      your configuration file, then it will be accessible in Liquid as <code>site.foo</code>.
+      Jekyll does not parse changes to <code>_config.yml</code> in
+      <code>watch</code> mode, you must restart Jekyll to see changes to variables.
+
+page:
+  - name: page.content
+    description: >-
+      The content of the Page, rendered or un-rendered depending upon
+      what Liquid is being processed and what <code>page</code> is.
+  - name: page.title
+    description: >-
+      The title of the Page.
+  - name: page.excerpt
+    description: >-
+      The un-rendered excerpt of a document.
+  - name: page.url
+    description: >-
+      The URL of the Post without the domain, but with a leading slash, e.g.
+      <code>/2008/12/14/my-post.html</code>
+  - name: page.date
+    description: >-
+      The Date assigned to the Post. This can be overridden in a Post’s front matter by specifying
+      a new date/time in the format <code>YYYY-MM-DD HH:MM:SS</code> (assuming UTC), or
+      <code>YYYY-MM-DD HH:MM:SS +/-TTTT</code> (to specify a time zone using an offset from UTC.
+      e.g. <code>2008-12-14 10:30:00 +0900</code>).
+  - name: page.id
+    description: >-
+      An identifier unique to a document in a Collection or a Post (useful in RSS feeds). e.g.
+      <code>/2008/12/14/my-post</code><code>/my-collection/my-document</code>
+  - name: page.categories
+    description: >-
+      The list of categories to which this post belongs. Categories are derived from the directory
+      structure above the <code>_posts</code> directory. For example, a post at
+      <code>/work/code/_posts/2008-12-24-closures.md</code> would have this field set to
+      <code>['work', 'code']</code>. These can also be specified in the
+      <a href="/docs/front-matter/">front matter</a>.
+  - name: page.collection
+    description: >-
+      The label of the collection to which this document belongs. e.g. <code>posts</code> for a post, or
+      <code>puppies</code> for a document at path <code>_puppies/rover.md</code>. If not part of a
+      collection, an empty string is returned.
+  - name: page.tags
+    description: >-
+      The list of tags to which this post belongs. These can be specified in the
+      <a href="/docs/front-matter/">front matter</a>.
+  - name: page.dir
+    description: >-
+      The path between the source directory and the file of the post or page,  e.g.
+      <code>/pages/</code>.
+      This can be overridden by <code>permalink</code> in the <a href="/docs/front-matter/">front matter</a>.
+  - name: page.name
+    description: >-
+      The filename of the post or page, e.g. <code>about.md</code>
+  - name: page.path
+    description: >-
+      The path to the raw post or page. Example usage: Linking back to the page or post’s source
+      on GitHub. This can be overridden in the <a href="/docs/front-matter/">front matter</a>.
+  - name: page.next
+    description: >-
+      The next post relative to the position of the current post in <code>site.posts</code>.
+      Returns <code>nil</code> for the last entry.
+  - name: page.previous
+    description: >-
+      The previous post relative to the position of the current post in <code>site.posts</code>.
+      Returns <code>nil</code> for the first entry.
+
+paginator:
+  - name: paginator.page
+    description: The number of the current page
+  - name: paginator.per_page
+    description: Number of posts per page
+  - name: paginator.posts
+    description: Posts available for the current page
+  - name: paginator.total_posts
+    description: Total number of posts
+  - name: paginator.total_pages
+    description: Total number of pages
+  - name: paginator.previous_page
+    description: >-
+      The number of the previous page, or <code>nil</code> if no previous page exists
+  - name: paginator.previous_page_path
+    description: >-
+      The path to the previous page, or <code>nil</code> if no previous page exists
+  - name: paginator.next_page
+    description: >-
+      The number of the next page, or <code>nil</code> if no subsequent page exists
+  - name: paginator.next_page_path
+    description: >-
+      The path to the next page, or <code>nil</code> if no subsequent page exists

docs/_data/jekyllconf-talks.yml

@@ -53,7 +53,7 @@
   year: 2016
 
 - speaker: Amy Johnston
-  twitter_handle: amybeukenex
+  twitter_handle: AmyJohnstonXL
   youtube_id: HR12JiUI2Zc
   topic: Jekyll for Technical Documentation
   year: 2016
@@ -83,7 +83,7 @@
   year: 2016
 
 - speaker: Julio Faerman
-  twitter_handle: jmfaerman
+  twitter_handle: juliodevrel
   youtube_id: SOMonG8Iqak
   topic: Jekyll on AWS
   year: 2016
@@ -131,7 +131,7 @@
   year: 2016
 
 - speaker: Nils Borchers
-  twitter_handle: nilsborchers
+  twitter_handle: nilsbo
   youtube_id: DtNMjuv6Rbo
   topic: Building a living brand guide with Jekyll and Hologram
   year: 2016
@@ -165,3 +165,45 @@
   youtube_id: nq1AUB72GCQ
   topic: Overcoming challenges in using Jekyll for documentation projects
   year: 2016
+
+- speaker: Pieter Roozen
+  twitter_handle: Pieter_Roozen
+  youtube_id: moQP0SqEPsw
+  topic: Jekyll As An API Endpoint
+  year: 2019
+
+- speaker: Chen Hui Jing
+  twitter_handle: hj_chen
+  youtube_id: CERXESTZ5w4
+  topic: Why I love Jekyll Data Files
+  year: 2019
+
+- speaker: Chris Ferdinandi
+  twitter_handle: ChrisFerdinandi
+  youtube_id: vR1aI_kQ4-A
+  topic: The Lean Web
+  year: 2019
+  
+- speaker: Catherine Roebuck
+  twitter_handle: 
+  youtube_id: zTAP1m1BaDM
+  topic: Jekyll For City Government
+  year: 2019
+  
+- speaker: Joost van der Schee
+  twitter_handle: jhvanderschee
+  youtube_id: ztJJ1GSlYgI
+  topic: "Jekyll Codex - Jekyll for front-end developers"
+  year: 2019
+  
+- speaker: Matthew Loberg
+  twitter_handle: mloberg
+  youtube_id: 6eiAjAtSGqw
+  topic: Leverage AWS S3 And CloudFront To Deploy Blazing Fast Jekyll Sites
+  year: 2019
+  
+- speaker: George Phillips
+  twitter_handle: gphillips_nz
+  youtube_id: nEvdOwFJBVc
+  topic: Structuring Jekyll Sites For Enterprise Design Systems
+  year: 2019

docs/_data/primary_nav.yml

@@ -0,0 +1,15 @@
+- title: Home
+  link: /
+  show_on_mobile: true
+- title: Docs
+  link: /docs/
+  show_on_mobile: true
+- title: Resources
+  link: /resources/
+  show_on_mobile: true
+- title: Showcase
+  link: /showcase/
+  show_on_mobile: false
+- title: News
+  link: /news/
+  show_on_mobile: true

docs/_data/ruby.yml

@@ -0,0 +1,3 @@
+min_version: 2.5.0
+current_version: 2.7.2
+current_version_output: ruby 2.7.2p137 (2020-10-01 revision 5445e04352)

docs/_data/showcase.yml

@@ -0,0 +1,329 @@
+- name: Tom Preston Werner Blog
+  url: http://tom.preston-werner.com/
+  image: tom-preston-werner.png
+  categories:
+    - personal
+    - blog
+
+# - name: White House Social and Behavioral Sciences Team
+#   url: https://sbst.gov/
+#   image: sbst.png
+#   categories:
+#     - government
+
+- name: SiteLeaf
+  url: https://siteleaf.com
+  image: siteleaf.png
+  categories:
+    - software
+    - marketing-site
+
+- name: CloudCannon
+  url: https://cloudcannon.com/
+  image: cloudcannon.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Vesterheim Norwegian-American Museum
+  url: http://vesterheim.org/
+  image: vesterheim.png
+  categories:
+    - marketing-site
+
+- name: KOTN
+  url: https://kotn.com/
+  image: kotn.png
+  categories:
+   - marketing-site
+
+- name: MvvmCross
+  url: https://www.mvvmcross.com/
+  image: mvvm.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Vidgrid
+  url: https://www.vidgrid.com/
+  image: vidgrid.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Bitcoin
+  url: https://bitcoin.org/en/
+  image: bitcoin.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Mapwize
+  url: https://www.mapwize.io/
+  image: mapwize.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Auth0 Blog
+  url: https://auth0.com/blog/
+  image: auth0-blog.png
+  categories:
+    - software
+    - blog
+
+- name: AWS Amplify
+  url: https://aws-amplify.github.io/
+  image: amplify-framework.png
+  categories:
+    - open-source
+    - marketing-site
+
+- name: Freedom of Information Act
+  url: https://www.foia.gov/
+  image: foia-gov.png
+  categories:
+    - government
+
+- name: "Art & About Sydney"
+  url: https://www.artandabout.com.au/
+  image: art-sydney.png
+  categories:
+    - government
+
+- name: Passbolt Help
+  url: https://help.passbolt.com/
+  image: passbolt-help.png
+  categories:
+    - knowledgebase
+
+- name: We are COLLINS
+  url: https://www.wearecollins.com/
+  image: collins.png
+  categories:
+    - agency
+
+- name: Lightburn
+  url: https://lightburn.co/
+  image: lightburn.png
+  categories:
+    - agency
+
+- name: italia.it
+  url: https://developers.italia.it/
+  image: italia-it.png
+  categories:
+    - community
+
+- name: Sydney New Years Eve
+  url: https://www.sydneynewyearseve.com/
+  image: nsw.png
+  categories:
+    - government
+
+- name: Login.gov
+  url: https://login.gov/
+  image: login-gov.png
+  categories:
+    - government
+
+- name: plainlanguage.gov
+  url: https://plainlanguage.gov/
+  image: plainlanguage-gov.png
+  categories:
+    - government
+
+- name: U.S. Web Design Standards
+  url: https://standards.usa.gov/
+  image: uswds.png
+  categories:
+    - government
+
+- name: Grantmaker Search
+  url: https://www.grantmakers.io/
+  image: grantmakers.png
+  categories:
+    - marketing-site
+
+- name: Rehan Butt
+  url: http://rehanbutt.com/
+  image: rehn.png
+  categories:
+    - personal
+    - portfolio
+
+- name: The Markdown Guide
+  url: https://www.markdownguide.org/
+  image: markdown-guide.png
+  categories:
+    - knowledgebase
+
+- name: Probot
+  url: https://probot.github.io/
+  image: probot.png
+  categories:
+    - documentation
+
+- name: Matt Grey
+  url: https://himatt.com/
+  image: matt-grey.png
+  categories:
+    - personal
+    - portfolio
+
+- name: Lattice
+  url: https://latticehq.com/
+  image: lattice.png
+  categories:
+    - software
+    - marketing-site
+
+- name: MailTape
+  url: https://www.mailta.pe/
+  image: mailtape.png
+  categories:
+    - other
+
+- name: Digital Democracy
+  url: http://www.digital-democracy.org/
+  image: digital-democracy.png
+  categories:
+    - other
+
+- name: HTML Reference
+  url: http://htmlreference.io/
+  image: htmlreference.png
+  categories:
+    - documentation
+
+- name: CSS Reference
+  url: http://cssreference.io/
+  image: cssreference.png
+  categories:
+    - documentation
+
+- name: Chain
+  url: https://chain.com/
+  image: chain.png
+  categories:
+    - marketing-site
+
+- name: IBM MobileFirst Foundation
+  url: https://mobilefirstplatform.ibmcloud.com/
+  image: ibm-mobile-foundation.png
+  categories:
+    - documentation
+
+- name: "18F"
+  url: https://18f.gsa.gov/
+  image: 18f.png
+  categories:
+    - agency
+    - government
+
+- name: Development Seed
+  url: https://developmentseed.org/
+  image: development-seed.png
+  categories:
+    - agency
+
+- name: Isomer - Singapore Government Static Websites
+  url: https://isomer.gov.sg/
+  image: isomer.png
+  categories:
+    - government
+
+- name: French Government Digital Services
+  url: https://beta.gouv.fr/
+  image: beta-gouv-fr.png
+  categories:
+    - government
+
+- name: Paris Call for Trust and Security in Cyberspace
+  url: https://pariscall.international/
+  image: appel-de-paris.png
+  categories:
+    - government
+
+- name: GitHub On Demand Training
+  url: https://services.github.com/on-demand/
+  image: github-learning-lab.png
+  categories:
+    - software
+    - knowledgebase
+
+- name: TwitchCon
+  url: https://www.twitchcon.com/
+  image: twitchcon.png
+  categories:
+    - marketing-site
+    - conference
+
+- name: UN World Statistics
+  url: https://worldstatisticsday.org
+  image: world-statistics-day.png
+  categories:
+    - government
+
+- name: Netflix Devices
+  url: https://devices.netflix.com/en/
+  image: netflix.png
+  categories:
+    - marketing-site
+
+- name: Twitch Developer Documentation
+  url: https://dev.twitch.tv/
+  image: twitch-developers.png
+  categories:
+    - marketing-site
+    - documentation
+
+- name: Yeoman
+  url: http://yeoman.io/
+  image: yeoman.png
+  categories:
+    - open-source
+    - marketing-site
+
+- name: Release Management Blog
+  url: https://release.mozilla.org/
+  image: mozilla-release-blog.png
+  categories:
+    - software
+    - blog
+
+- name: frame.ai
+  url: https://frame.ai/
+  image: frame-ai.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Ionic Framwork
+  url: https://ionicframework.com/
+  image: ionic-framework.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Spotify for Developers
+  url: https://developer.spotify.com
+  image: spotify-developers.png
+  categories:
+    - marketing-site
+    - documentation
+    - software
+
+- name: Sketch
+  url: https://sketch.com/
+  image: sketch.png
+  categories:
+    - software
+    - marketing-site
+
+- name: Ruby on Rails
+  url: http://rubyonrails.org/
+  image: ruby-on-rails.png
+  categories:
+    - marketing-site
+    - documentation

docs/_data/tutorials.yml

@@ -7,6 +7,7 @@
   - custom-404-page
   - convert-site-to-jekyll
   - using-jekyll-with-bundler
+  - csv-to-table
 
 #- title: Another section
 #  tutorials:

docs/_docs/assets.md

@@ -3,10 +3,11 @@ title: Assets
 permalink: /docs/assets/
 ---
 
-Jekyll provides built-in support for Sass and can work with CoffeeScript via
-a Ruby gem. In order to use them, you must first create a file with the
-proper extension name (one of `.sass`, `.scss`, or `.coffee`) and ***start the
-file with two lines of triple dashes***, like this:
+Jekyll provides built-in support for [Sass](https://sass-lang.com/)
+and can work with [CoffeeScript](https://coffeescript.org/) via a Ruby gem.
+In order to use them, you must first create a file with the proper extension
+name (one of `.sass`, `.scss`, or `.coffee`) and
+***start the file with two lines of triple dashes***, like this:
 
 ```sass
 ---
@@ -27,7 +28,7 @@ will process it and put it in your site's destination folder under
   <h5>Jekyll processes all Liquid filters and tags in asset files</h5>
   <p>If you are using <a href="https://mustache.github.io">Mustache</a>
      or another JavaScript templating language that conflicts with
-     the <a href="/docs/templates/">Liquid template syntax</a>, you
+     the <a href="{{ '/docs/templates/' | relative_url }}">Liquid template syntax</a>, you
      will need to place <code>{&#37; raw &#37;}</code> and
      <code>{&#37; endraw &#37;}</code> tags around your code.</p>
 </div>
@@ -42,8 +43,7 @@ them to be in the output file, such as `<source>/css`. For an example, take
 a look at [this example site using Sass support in Jekyll][example-sass].
 
 If you are using Sass `@import` statements, you'll need to ensure that your
-`sass_dir` is set to the base directory that contains your Sass files. You
-can do that thusly:
+`sass_dir` is set to the base directory that contains your Sass files:
 
 ```yaml
 sass:
@@ -61,8 +61,8 @@ The Sass converter will default the `sass_dir` configuration option to
 
     Note that the <code>sass_dir</code> becomes the load path for Sass imports,
     nothing more. This means that Jekyll does not know about these files
-    directly, so any files here should not contain the YAML Front Matter as
-    described above nor will they be transformed as described above. This
+    directly. Any files here should not contain the empty front matter as
+    described above. If they do, they'll not be transformed as described above. This
     folder should only contain imports.
 
   </p>
@@ -79,7 +79,6 @@ sass:
 These are passed to Sass, so any output style options Sass supports are valid
 here, too.
 
-
 ## Coffeescript
 
 To enable Coffeescript in Jekyll 3.0 and up you must
@@ -89,5 +88,5 @@ To enable Coffeescript in Jekyll 3.0 and up you must
 
 ```yaml
 plugins:
- - jekyll-coffeescript
+  - jekyll-coffeescript
 ```

docs/_docs/code_of_conduct.md

@@ -6,25 +6,42 @@ redirect_from: "/conduct/index.html"
 editable: false
 ---
 
-As contributors and maintainers of this project, and in the interest of
-fostering an open and welcoming community, we pledge to respect all people who
-contribute through reporting issues, posting feature requests, updating
-documentation, submitting pull requests or patches, and other activities.
+## Our Pledge
 
-We are committed to making participation in this project a harassment-free
-experience for everyone, regardless of level of experience, gender, gender
-identity and expression, sexual orientation, disability, personal appearance,
-body size, race, ethnicity, age, religion, or nationality.
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, sex characteristics, gender identity and expression,
+level of experience, education, socio-economic status, nationality, personal
+appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
 
 Examples of unacceptable behavior by participants include:
 
-* The use of sexualized language or imagery
-* Personal attacks
-* Trolling or insulting/derogatory comments
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
 * Public or private harassment
-* Publishing other's private information, such as physical or electronic
-  addresses, without explicit permission
-* Other unethical or unprofessional conduct
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
 
 Project maintainers have the right and responsibility to remove, edit, or
 reject comments, commits, code, wiki edits, issues, and other contributions
@@ -32,24 +49,34 @@ that are not aligned to this Code of Conduct, or to ban temporarily or
 permanently any contributor for other behaviors that they deem inappropriate,
 threatening, offensive, or harmful.
 
-By adopting this Code of Conduct, project maintainers commit themselves to
-fairly and consistently applying these principles to every aspect of managing
-this project. Project maintainers who do not follow or enforce the Code of
-Conduct may be permanently removed from the project team.
+## Scope
 
 This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community.
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by opening an issue or contacting a project maintainer. All complaints
-will be reviewed and investigated and will result in a response that is deemed
-necessary and appropriate to the circumstances. Maintainers are obligated to
-maintain confidentiality with regard to the reporter of an incident.
+reported by contacting the project team at [olivia@jekyllrb.com](mailto:olivia@jekyllrb.com). All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
 
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
 
-This Code of Conduct is adapted from the [Contributor Covenant][homepage],
-version 1.3.0, available at
-[http://contributor-covenant.org/version/1/3/0/][version]
+## Attribution
 
-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/3/0/
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [https://www.contributor-covenant.org/version/1/4/code-of-conduct.html](https://www.contributor-covenant.org/version/1/4/code-of-conduct.html)
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see
+[https://www.contributor-covenant.org/faq](https://www.contributor-covenant.org/faq)

docs/_docs/collections.md

@@ -3,48 +3,33 @@ title: Collections
 permalink: /docs/collections/
 ---
 
-Not everything is a post or a page. Maybe you want to document the various
-methods in your open source project, members of a team, or talks at a
-conference. Collections allow you to define a new type of document that behave
-like Pages or Posts do normally, but also have their own unique properties and
-namespace.
+Collections are a great way to group related content like members of a team or
+talks at a conference.
 
-## Using Collections
+## Setup
 
-To start using collections, follow these 3 steps:
-
-* [Step 1: Tell Jekyll to read in your collection](#step1)
-* [Step 2: Add your content](#step2)
-* [Step 3: Optionally render your collection's documents into independent files](#step3)
-
-### Step 1: Tell Jekyll to read in your collection {#step1}
-
-Add the following to your site's `_config.yml` file, replacing `my_collection`
-with the name of your collection:
+To use a Collection you first need to define it in your `_config.yml`. For
+example here's a collection of staff members:
 
 ```yaml
 collections:
-- my_collection
+  - staff_members
 ```
 
-You can optionally specify metadata for your collection in the configuration:
+In this case `collections` is defined as a sequence (i.e array) with no additional metadata defined for each collection.
+You can optionally specify metadata for your collection by defining `collections` as a mapping (i.e hashmap) instead of sequence, and then defining additional fields in it:
 
 ```yaml
 collections:
-  my_collection:
-    foo: bar
+  staff_members:
+    people: true
 ```
 
-Default attributes can also be set for a collection:
-
-```yaml
-defaults:
-  - scope:
-      path: ""
-      type: my_collection
-    values:
-      layout: page
-```
+{: .note .info}
+When defining a collection as a sequence, its pages will not be rendered by
+default. To enable this, <code>output: true</code> must be specified on the
+collection, which requires defining the collection as a mapping. For more
+information, see the section <a href="#output">Output</a>.
 
 <div class="note">
   <h5>Gather your collections {%- include docs_version_badge.html version="3.7.0" -%}</h5>
@@ -56,17 +41,40 @@ defaults:
 </div>
 
 <div class="note warning">
-  <h5>Be sure to move posts into custom collections directory</h5>
+  <h5>Be sure to move drafts and posts into custom collections directory</h5>
 
-  <p>If you specify a directory to store all your collections in the same place with <code>collections_dir: my_collections</code>, then you will need to move your <code>_posts</code> directory to <code>my_collections/_posts</code>. Note that, the name of your collections directory cannot start with an underscore (`_`).</p>
+  <p>If you specify a directory to store all your collections in the same place with <code>collections_dir: my_collections</code>, then you will need to move your <code>_drafts</code> and <code>_posts</code> directory to <code>my_collections/_drafts</code> and <code>my_collections/_posts</code>. Note that, the name of your collections directory cannot start with an underscore (`_`).</p>
 </div>
 
-### Step 2: Add your content {#step2}
+## Add content
 
-Create a corresponding folder (e.g. `<source>/_my_collection`) and add
-documents. YAML front matter is processed if the front matter exists, and everything
-after the front matter is pushed into the document's `content` attribute. If no YAML front
-matter is provided, Jekyll will not generate the file in your collection.
+Create a corresponding folder (e.g. `<source>/_staff_members`) and add
+documents. Front matter is processed if the front matter exists, and everything
+after the front matter is pushed into the document's `content` attribute. If no front
+matter is provided, Jekyll will consider it to be a [static file]({{ '/docs/static-files/' | relative_url }})
+and the contents will not undergo further processing. If front matter is provided,
+Jekyll will process the file contents into the expected output.
+
+Regardless of whether front matter exists or not, Jekyll will write to the destination
+directory (e.g. `_site`) only if `output: true` has been set in the collection's
+metadata.
+
+For example here's how you would add a staff member to the collection set above.
+The filename is `./_staff_members/jane.md` with the following content:
+
+```markdown
+---
+name: Jane Doe
+position: Developer
+---
+Jane has worked on Jekyll for the past *five years*.
+```
+
+<em>
+  Do note that in spite of being considered as a collection internally, the above
+  doesn't apply to [posts](/docs/posts/). Posts with a valid filename format will be
+  marked for processing even if they do not contain front matter.
+</em>
 
 <div class="note info">
   <h5>Be sure to name your directories correctly</h5>
@@ -76,190 +84,108 @@ your <code>_config.yml</code> file, with the addition of the preceding <code>_</
   </p>
 </div>
 
-### Step 3: Optionally render your collection's documents into independent files {#step3}
+## Output
 
-If you'd like Jekyll to create a public-facing, rendered version of each
-document in your collection, set the `output` key to `true` in your collection
-metadata in your `_config.yml`:
-
-```yaml
-collections:
-  my_collection:
-    output: true
-```
-
-This will produce a file for each document in the collection.
-For example, if you have `_my_collection/some_subdir/some_doc.md`,
-it will be rendered using Liquid and the Markdown converter of your
-choice and written out to `<dest>/my_collection/some_subdir/some_doc.html`.
-
-If you wish a specific page to be shown when accessing `/my_collection/`,
-simply add `permalink: /my_collection/index.html` to a page.
-To list items from the collection, on that page or any other, you can use:
+Now you can iterate over `site.staff_members` on a page and output the content
+for each staff member. Similar to posts, the body of the document is accessed
+using the `content` variable:
 
 {% raw %}
 ```liquid
-{% for item in site.my_collection %}
-  <h2>{{ item.title }}</h2>
-  <p>{{ item.description }}</p>
-  <p><a href="{{ item.url }}">{{ item.title }}</a></p>
+{% for staff_member in site.staff_members %}
+  <h2>{{ staff_member.name }} - {{ staff_member.position }}</h2>
+  <p>{{ staff_member.content | markdownify }}</p>
 {% endfor %}
 ```
 {% endraw %}
 
-<div class="note info">
-  <h5>Don't forget to add YAML for processing</h5>
-  <p>
-  Files in collections that do not have front matter are treated as
-  <a href="/docs/static-files">static files</a> and simply copied to their
-  output location without processing.
-  </p>
-</div>
-
-## Configuring permalinks for collections {#permalinks}
-
-If you wish to specify a custom pattern for the URLs where your Collection pages
-will reside, you may do so with the [`permalink` property](../permalinks/):
+If you'd like Jekyll to create a rendered page for each document in your
+collection, you can set the `output` key to `true` in your collection
+metadata in `_config.yml`:
 
 ```yaml
 collections:
-  my_collection:
+  staff_members:
     output: true
-    permalink: /:collection/:name
 ```
 
-### Examples
-
-For a collection with the following source file structure,
+You can link to the generated page using the `url` attribute:
 
+{% raw %}
+```liquid
+{% for staff_member in site.staff_members %}
+  <h2>
+    <a href="{{ staff_member.url }}">
+      {{ staff_member.name }} - {{ staff_member.position }}
+    </a>
+  </h2>
+  <p>{{ staff_member.content | markdownify }}</p>
+{% endfor %}
 ```
-_my_collection/
-└── some_subdir
-    └── some_doc.md
+{% endraw %}
+
+## Permalinks
+
+There are special [permalink variables for collections]({{ '/docs/permalinks/#collections' | relative_url }}) to
+help you control the output url for the entire collection.
+
+## Custom Sorting of Documents {%- include docs_version_badge.html version="4.0" -%}
+{: #custom-sorting-of-documents}
+
+By default, two documents in a collection are sorted by their `date` attribute when both of them have the `date` key in their front matter. However, if either or both documents do not have the `date` key in their front matter, they are sorted by their respective paths.
+
+You can control this sorting via the collection's metadata.
+
+### Sort By Front Matter Key
+
+Documents can be sorted based on a front matter key by setting a `sort_by` metadata to the front matter key string. For example,
+to sort a collection of tutorials based on key `lesson`, the configuration would be:
+
+```yaml
+collections:
+  tutorials:
+    sort_by: lesson
 ```
 
-each of the following `permalink` configurations will produce the document structure shown below it.
+The documents are arranged in the increasing order of the key's value. If a document does not have the front matter key defined
+then that document is placed immediately after sorted documents. When multiple documents do not have the front matter key defined,
+those documents are sorted by their dates or paths and then placed immediately after the sorted documents.
 
-* **Default**
-  Same as `permalink: /:collection/:path`.
+### Manually Ordering Documents
 
-  ```
-  _site/
-  ├── my_collection
-  │   └── some_subdir
-  │       └── some_doc.html
-  ...
-  ```
-* `permalink: pretty`
-  Same as `permalink: /:collection/:path/`.
+You can also manually order the documents by setting an `order` metadata with **the filenames listed** in the desired order.
+For example, a collection of tutorials would be configured as:
 
-  ```
-  _site/
-  ├── my_collection
-  │   └── some_subdir
-  │       └── some_doc
-  │           └── index.html
-  ...
-  ```
-* `permalink: /doc/:path`
+```yaml
+collections:
+  tutorials:
+    order:
+      - hello-world.md
+      - introduction.md
+      - basic-concepts.md
+      - advanced-concepts.md
+```
 
-  ```
-  _site/
-  ├── doc
-  │   └── some_subdir
-  │       └── some_doc.html
-  ...
-  ```
-* `permalink: /doc/:name`
+Any documents with filenames that do not match the list entry simply gets placed after the rearranged documents. If a document is
+nested under subdirectories, include them in entries as well:
 
-  ```
-  _site/
-  ├── doc
-  │   └── some_doc.html
-  ...
-  ```
-* `permalink: /:name`
+```yaml
+collections:
+  tutorials:
+    order:
+      - hello-world.md
+      - introduction.md
+      - concepts/basics.md
+      - concepts/advanced.md
+```
 
-  ```
-  _site/
-  ├── some_doc.html
-  ...
-  ```
-
-### Template Variables
-
-<div class="mobile-side-scroller">
-<table>
-  <thead>
-    <tr>
-      <th>Variable</th>
-      <th>Description</th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr>
-      <td>
-        <p><code>:collection</code></p>
-      </td>
-      <td>
-        <p>Label of the containing collection.</p>
-      </td>
-    </tr>
-    <tr>
-      <td>
-        <p><code>:path</code></p>
-      </td>
-      <td>
-        <p>Path to the document relative to the collection's directory.</p>
-      </td>
-    </tr>
-    <tr>
-      <td>
-        <p><code>:name</code></p>
-      </td>
-      <td>
-        <p>The document's base filename, with every sequence of spaces
-        and non-alphanumeric characters replaced by a hyphen.</p>
-      </td>
-    </tr>
-    <tr>
-      <td>
-        <p><code>:title</code></p>
-      </td>
-      <td>
-        <p>
-          The <code>:title</code> template variable will take the
-          <code>slug</code> <a href="/docs/frontmatter/">front matter</a>
-          variable value if any is present in the document; if none is
-          defined then <code>:title</code> will be equivalent to
-          <code>:name</code>, aka the slug generated from the filename.
-        </p>
-      </td>
-    </tr>
-    <tr>
-      <td>
-        <p><code>:output_ext</code></p>
-      </td>
-      <td>
-        <p>Extension of the output file. (Included by default and usually unnecessary.)</p>
-      </td>
-    </tr>
-  </tbody>
-</table>
-</div>
+If both metadata keys have been defined properly, `order` list takes precedence.
 
 ## Liquid Attributes
 
 ### Collections
 
-Each collection is accessible as a field on the `site` variable. For example, if
-you want to access the `albums` collection found in `_albums`, you'd use
-`site.albums`.
-
-Each collection is itself an array of documents (e.g., `site.albums` is an array of documents, much like `site.pages` and
-`site.posts`). See the table below for how to access attributes of those documents.
-
-The collections are also available under `site.collections`, with the metadata
+Collections are also available under `site.collections`, with the metadata
 you specified in your `_config.yml` (if present) and the following information:
 
 <div class="mobile-side-scroller">
@@ -353,7 +279,7 @@ you specified in your `_config.yml` (if present) and the following information:
   <p>Except for documents in hard-coded default collection <code>posts</code>, all documents in collections
     you create, are accessible via Liquid irrespective of their assigned date, if any, and therefore renderable.
   </p>
-  <p>However documents are attempted to be written to disk only if the concerned collection
+  <p>Documents are attempted to be written to disk only if the concerned collection
     metadata has <code>output: true</code>. Additionally, future-dated documents are only written if
     <code>site.future</code> <em>is also true</em>.
   </p>
@@ -362,10 +288,9 @@ you specified in your `_config.yml` (if present) and the following information:
   </p>
 </div>
 
-
 ### Documents
 
-In addition to any YAML Front Matter provided in the document's corresponding
+In addition to any front matter provided in the document's corresponding
 file, each document has the following attributes:
 
 <div class="mobile-side-scroller">
@@ -383,9 +308,9 @@ file, each document has the following attributes:
       </td>
       <td>
         <p>
-          The (unrendered) content of the document. If no YAML Front Matter is
+          The (unrendered) content of the document. If no front matter is
           provided, Jekyll will not generate the file in your collection. If
-          YAML Front Matter is used, then this is all the contents of the file
+          front matter is used, then this is all the contents of the file
           after the terminating
           `---` of the front matter.
         </p>
@@ -455,51 +380,3 @@ file, each document has the following attributes:
   </tbody>
 </table>
 </div>
-
-## Accessing Collection Attributes
-
-Attributes from the YAML front matter can be accessed as data anywhere in the
-site. Using the above example for configuring a collection as `site.albums`,
-you might have front matter in an individual file structured as follows (which
-must use a supported markup format, and cannot be saved with a `.yaml`
-extension):
-
-```yaml
-title: "Josquin: Missa De beata virgine and Missa Ave maris stella"
-artist: "The Tallis Scholars"
-director: "Peter Phillips"
-works:
-  - title: "Missa De beata virgine"
-    composer: "Josquin des Prez"
-    tracks:
-      - title: "Kyrie"
-        duration: "4:25"
-      - title: "Gloria"
-        duration: "9:53"
-      - title: "Credo"
-        duration: "9:09"
-      - title: "Sanctus & Benedictus"
-        duration: "7:47"
-      - title: "Agnus Dei I, II & III"
-        duration: "6:49"
-```
-
-Every album in the collection could be listed on a single page with a template:
-
-```liquid
-{% raw %}
-{% for album in site.albums %}
-  <h2>{{ album.title }}</h2>
-  <p>Performed by {{ album.artist }}{% if album.director %}, directed by {{ album.director }}{% endif %}</p>
-  {% for work in album.works %}
-    <h3>{{ work.title }}</h3>
-    <p>Composed by {{ work.composer }}</p>
-    <ul>
-    {% for track in work.tracks %}
-      <li>{{ track.title }} ({{ track.duration }})</li>
-    {% endfor %}
-    </ul>
-  {% endfor %}
-{% endfor %}
-{% endraw %}
-```

docs/_docs/community/bug.md

@@ -0,0 +1,8 @@
+---
+title: Report a bug
+permalink: "/docs/community/bug/"
+---
+
+If you think you've found a bug within a Jekyll plugin, open an issue in that plugin's repository — First [look for the plugin on rubygems](https://rubygems.org/) then click on the `Homepage` link to access the plugin repository.
+
+If you think you've found a bug within Jekyll itself, [open an issue](https://github.com/jekyll/jekyll/issues/new).

docs/_docs/community/community.md

@@ -0,0 +1,37 @@
+---
+title: Community
+permalink: /docs/community/
+redirect_from: "/help/index.html"
+---
+
+## Jekyll Contributor Code of Conduct
+
+As contributors and maintainers of this project, and in the interest of fostering an open and welcoming community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or patches, and other activities.
+
+Read the full [code of conduct]({{ '/docs/conduct/' | relative_url }})
+
+## Where to get support
+
+If you're looking for support for Jekyll, there are a lot of options:
+
+* Read the [Jekyll Documentation]({{ '/docs/' | relative_url }})
+* If you have a question about using Jekyll, start a discussion on the [Jekyll Forum](https://talk.jekyllrb.com/) or [StackOverflow](https://stackoverflow.com/questions/tagged/jekyll)
+* Chat with Jekyllers — Join our [Gitter channel](https://gitter.im/jekyll/jekyll) or our [IRC channel on Freenode](irc:irc.freenode.net/jekyll)
+
+There are a bunch of helpful community members on these services who are willing to point you in the right direction.
+
+**Reminder: Jekyll's issue tracker is not a support forum.**
+
+## Ways to contribute
+
+* [How to Contribute]({{ '/docs/contributing/' | relative_url }})
+* [How to file a bug]({{ '/docs/community/bug/' | relative_url }})
+* [Guide for maintaining Jekyll]({{ '/docs/maintaining/' | relative_url }})
+
+## Jekyllconf
+
+[Watch videos]({{ '/jekyllconf/' | relative_url }}) from members of the Jekyll community speak about interesting use cases, tricks they’ve learned or meta Jekyll topics.
+
+## Jekyll on Twitter
+
+The [official Jekyll Twitter account](https://twitter.com/jekyllrb).

docs/_docs/conduct.md

@@ -6,25 +6,42 @@ redirect_from: "/conduct/index.html"
 editable: false
 ---
 
-As contributors and maintainers of this project, and in the interest of
-fostering an open and welcoming community, we pledge to respect all people who
-contribute through reporting issues, posting feature requests, updating
-documentation, submitting pull requests or patches, and other activities.
+## Our Pledge
 
-We are committed to making participation in this project a harassment-free
-experience for everyone, regardless of level of experience, gender, gender
-identity and expression, sexual orientation, disability, personal appearance,
-body size, race, ethnicity, age, religion, or nationality.
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, sex characteristics, gender identity and expression,
+level of experience, education, socio-economic status, nationality, personal
+appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
 
 Examples of unacceptable behavior by participants include:
 
-* The use of sexualized language or imagery
-* Personal attacks
-* Trolling or insulting/derogatory comments
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
 * Public or private harassment
-* Publishing other's private information, such as physical or electronic
-  addresses, without explicit permission
-* Other unethical or unprofessional conduct
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
 
 Project maintainers have the right and responsibility to remove, edit, or
 reject comments, commits, code, wiki edits, issues, and other contributions
@@ -32,24 +49,34 @@ that are not aligned to this Code of Conduct, or to ban temporarily or
 permanently any contributor for other behaviors that they deem inappropriate,
 threatening, offensive, or harmful.
 
-By adopting this Code of Conduct, project maintainers commit themselves to
-fairly and consistently applying these principles to every aspect of managing
-this project. Project maintainers who do not follow or enforce the Code of
-Conduct may be permanently removed from the project team.
+## Scope
 
 This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community.
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by opening an issue or contacting a project maintainer. All complaints
-will be reviewed and investigated and will result in a response that is deemed
-necessary and appropriate to the circumstances. Maintainers are obligated to
-maintain confidentiality with regard to the reporter of an incident.
+reported by contacting the project team at [olivia@jekyllrb.com](mailto:olivia@jekyllrb.com). All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
 
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
 
-This Code of Conduct is adapted from the [Contributor Covenant][homepage],
-version 1.3.0, available at
-[http://contributor-covenant.org/version/1/3/0/][version]
+## Attribution
 
-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/3/0/
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [https://www.contributor-covenant.org/version/1/4/code-of-conduct.html](https://www.contributor-covenant.org/version/1/4/code-of-conduct.html)
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see
+[https://www.contributor-covenant.org/faq](https://www.contributor-covenant.org/faq)

docs/_docs/configuration.md

@@ -3,782 +3,16 @@ title: Configuration
 permalink: /docs/configuration/
 ---
 
-Jekyll allows you to concoct your sites in any way you can dream up, and it’s
-thanks to the powerful and flexible configuration options that this is possible.
-These options can either be specified in a `_config.yml` file placed in your
-site’s root directory, or can be specified as flags for the `jekyll` executable
-in the terminal.
-
-## Configuration Settings
-
-### Global Configuration
-
-The table below lists the available settings for Jekyll, and the various <code
-class="option">options</code> (specified in the configuration file) and <code
-class="flag">flags</code> (specified on the command-line) that control them.
-
-<div class="mobile-side-scroller">
-<table>
-  <thead>
-    <tr>
-      <th>Setting</th>
-      <th>
-        <span class="option">Options</span> and <span class="flag">Flags</span>
-      </th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Site Source</strong></p>
-        <p class="description">Change the directory where Jekyll will read files</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">source: DIR</code></p>
-        <p><code class="flag">-s, --source DIR</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Site Destination</strong></p>
-        <p class="description">Change the directory where Jekyll will write files</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">destination: DIR</code></p>
-        <p><code class="flag">-d, --destination DIR</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Safe</strong></p>
-        <p class="description">Disable <a href="../plugins/">custom plugins, and ignore symbolic links</a>.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">safe: BOOL</code></p>
-        <p><code class="flag">--safe</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Exclude</strong></p>
-        <p class="description">
-          Exclude directories and/or files from the
-          conversion. These exclusions are relative to the site's
-          source directory and cannot be outside the source directory.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">exclude: [DIR, FILE, ...]</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Include</strong></p>
-        <p class="description">
-          Force inclusion of directories and/or files in the conversion.
-          <code>.htaccess</code> is a good example since dotfiles are excluded
-          by default.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">include: [DIR, FILE, ...]</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Keep files</strong></p>
-        <p class="description">
-          When clobbering the site destination, keep the selected files.
-          Useful for files that are not generated by jekyll; e.g. files or
-          assets that are generated by your build tool.
-          The paths are relative to the <code>destination</code>.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">keep_files: [DIR, FILE, ...]</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Time Zone</strong></p>
-        <p class="description">
-            Set the time zone for site generation. This sets the <code>TZ</code>
-            environment variable, which Ruby uses to handle time and date
-            creation and manipulation. Any entry from the
-            <a href="https://en.wikipedia.org/wiki/Tz_database">IANA Time Zone
-            Database</a> is valid, e.g. <code>America/New_York</code>. A list of all
-            available values can be found <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones">
-            here</a>. When serving on a local machine, the default time zone is set by your operating system. But when served on a remote host/server, the default time zone depends on the server's setting or location.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">timezone: TIMEZONE</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Encoding</strong></p>
-        <p class="description">
-            Set the encoding of files by name (only available for Ruby
-            1.9 or later).
-            The default value is <code>utf-8</code> starting in 2.0.0,
-            and <code>nil</code> before 2.0.0, which will yield the Ruby
-            default of <code>ASCII-8BIT</code>.
-            Available encodings can be shown by the
-            command <code>ruby -e 'puts Encoding::list.join("\n")'</code>.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">encoding: ENCODING</code></p>
-      </td>
-    </tr>
-    <tr>
-      <td>
-        <p class='name'><strong>Defaults</strong></p>
-        <p class='description'>
-            Set defaults for <a href="../frontmatter/" title="YAML Front Matter">YAML Front Matter</a>
-            variables.
-        </p>
-      </td>
-      <td class='align-center'>
-        <p>see <a href="#front-matter-defaults" title="details">below</a></p>
-      </td>
-    </tr>
-  </tbody>
-</table>
-</div>
-
-<div class="note warning">
-  <h5>Destination folders are cleaned on site builds</h5>
-  <p>
-    The contents of <code>&lt;destination&gt;</code> are automatically
-    cleaned, by default, when the site is built. Files or folders that are not
-    created by your site will be removed. Some files could be retained
-    by specifying them within the <code>&lt;keep_files&gt;</code> configuration directive.
-  </p>
-  <p>
-    Do not use an important location for <code>&lt;destination&gt;</code>; instead, use it as
-    a staging area and copy files from there to your web server.
-  </p>
-</div>
-
-### Build Command Options
-
-<div class="mobile-side-scroller">
-<table>
-  <thead>
-    <tr>
-      <th>Setting</th>
-      <th><span class="option">Options</span> and <span class="flag">Flags</span></th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Regeneration</strong></p>
-        <p class="description">Enable auto-regeneration of the site when files are modified.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">-w, --[no-]watch</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Configuration</strong></p>
-        <p class="description">Specify config files instead of using <code>_config.yml</code> automatically. Settings in later files override settings in earlier files.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">--config FILE1[,FILE2,...]</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Drafts</strong></p>
-        <p class="description">Process and render draft posts.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">show_drafts: BOOL</code></p>
-        <p><code class="flag">--drafts</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Environment</strong></p>
-        <p class="description">Use a specific environment value in the build.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">JEKYLL_ENV=production</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Future</strong></p>
-        <p class="description">Publish posts or collection documents with a future date.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">future: BOOL</code></p>
-        <p><code class="flag">--future</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Unpublished</strong></p>
-        <p class="description">Render posts that were marked as unpublished.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">unpublished: BOOL</code></p>
-        <p><code class="flag">--unpublished</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>LSI</strong></p>
-        <p class="description">Produce an index for related posts. Requires the <a href="http://www.classifier-reborn.com/">classifier-reborn</a> plugin.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">lsi: BOOL</code></p>
-        <p><code class="flag">--lsi</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Limit Posts</strong></p>
-        <p class="description">Limit the number of posts to parse and publish.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">limit_posts: NUM</code></p>
-        <p><code class="flag">--limit_posts NUM</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Force polling</strong></p>
-        <p class="description">Force watch to use polling.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">--force_polling</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Verbose output</strong></p>
-        <p class="description">Print verbose output.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">-V, --verbose</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Silence Output</strong></p>
-        <p class="description">Silence the normal output from Jekyll
-        during a build</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">-q, --quiet</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Incremental build</strong></p>
-        <p class="description">
-            Enable the experimental incremental build feature. Incremental build only
-            re-builds posts and pages that have changed, resulting in significant performance
-            improvements for large sites, but may also break site generation in certain
-            cases.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">incremental: BOOL</code></p>
-        <p><code class="flag">-I, --incremental</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Liquid profiler</strong></p>
-        <p class="description">
-            Generate a Liquid rendering profile to help you identify performance bottlenecks.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">profile: BOOL</code></p>
-        <p><code class="flag">--profile</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Strict Front Matter</strong></p>
-        <p class="description">
-            Cause a build to fail if there is a YAML syntax error in a page's front matter.
-        </p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">strict_front_matter: BOOL</code></p>
-        <p><code class="flag">--strict_front_matter</code></p>
-      </td>
-    </tr>
-  </tbody>
-</table>
-</div>
-
-
-### Serve Command Options
-
-In addition to the options below, the `serve` sub-command can accept any of the options
-for the `build` sub-command, which are then applied to the site build which occurs right
-before your site is served.
-
-<div class="mobile-side-scroller">
-<table>
-  <thead>
-    <tr>
-      <th>Setting</th>
-      <th><span class="option">Options</span> and <span class="flag">Flags</span></th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Local Server Port</strong></p>
-        <p class="description">Listen on the given port.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">port: PORT</code></p>
-        <p><code class="flag">--port PORT</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Local Server Hostname</strong></p>
-        <p class="description">Listen at the given hostname.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">host: HOSTNAME</code></p>
-        <p><code class="flag">--host HOSTNAME</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Base URL</strong></p>
-        <p class="description">Serve the website from the given base URL</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">baseurl: URL</code></p>
-        <p><code class="flag">--baseurl URL</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Detach</strong></p>
-        <p class="description">Detach the server from the terminal</p>
-      </td>
-      <td class="align-center">
-        <p><code class="option">detach: BOOL</code></p>
-        <p><code class="flag">-B, --detach</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>Skips the initial site build.</strong></p>
-        <p class="description">Skips the initial site build which occurs before the server is started.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">--skip-initial-build</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>X.509 (SSL) Private Key</strong></p>
-        <p class="description">SSL Private Key.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">--ssl-key</code></p>
-      </td>
-    </tr>
-    <tr class="setting">
-      <td>
-        <p class="name"><strong>X.509 (SSL) Certificate</strong></p>
-        <p class="description">SSL Public certificate.</p>
-      </td>
-      <td class="align-center">
-        <p><code class="flag">--ssl-cert</code></p>
-      </td>
-    </tr>
-  </tbody>
-</table>
-</div>
-
-<div class="note warning">
-  <h5>Do not use tabs in configuration files</h5>
-  <p>
-    This will either lead to parsing errors, or Jekyll will revert to the
-    default settings. Use spaces instead.
-  </p>
-</div>
-
-## Custom WEBrick Headers
-
-You can provide custom headers for your site by adding them to `_config.yml`
-
-```yaml
-# File: _config.yml
-webrick:
-  headers:
-    My-Header: My-Value
-    My-Other-Header: My-Other-Value
-```
-
-### Defaults
-
-We provide by default `Content-Type` and `Cache-Control` response headers: one
-dynamic in order to specify the nature of the data being served, the other
-static in order to disable caching so that you don't have to fight with Chrome's
-aggressive caching when you are in development mode.
-
-## Specifying a Jekyll environment at build time
-
-In the build (or serve) arguments, you can specify a Jekyll environment and value. The build will then apply this value in any conditional statements in your content.
-
-For example, suppose you set this conditional statement in your code:
-
-```liquid
-{% raw %}
-{% if jekyll.environment == "production" %}
-   {% include disqus.html %}
-{% endif %}
-{% endraw %}
-```
-
-When you build your Jekyll site, the content inside the `if` statement won't be run unless you also specify a `production` environment in the build command, like this:
-
-```sh
-JEKYLL_ENV=production jekyll build
-```
-
-Specifying an environment value allows you to make certain content available only within specific environments.
-
-The default value for `JEKYLL_ENV` is `development`. Therefore if you omit `JEKYLL_ENV` from the build arguments, the default value will be `JEKYLL_ENV=development`. Any content inside `{% raw %}{% if jekyll.environment == "development" %}{% endraw %}` tags will automatically appear in the build.
-
-Your environment values can be anything you want (not just `development` or `production`). Some elements you might want to hide in development environments include Disqus comment forms or Google Analytics. Conversely, you might want to expose an "Edit me in GitHub" button in a development environment but not include it in production environments.
-
-By specifying the option in the build command, you avoid having to change values in your configuration files when moving from one environment to another.
-
-## Front Matter defaults
-
-Using [YAML Front Matter](../frontmatter/) is one way that you can specify configuration in the pages and posts for your site. Setting things like a default layout, or customizing the title, or specifying a more precise date/time for the post can all be added to your page or post front matter.
-
-Often times, you will find that you are repeating a lot of configuration options. Setting the same layout in each file, adding the same category - or categories - to a post, etc. You can even add custom variables like author names, which might be the same for the majority of posts on your blog.
-
-Instead of repeating this configuration each time you create a new post or page, Jekyll provides a way to set these defaults in the site configuration. To do this, you can specify site-wide defaults using the `defaults` key in the `_config.yml` file in your project's root directory.
-
-The `defaults` key holds an array of scope/values pairs that define what defaults should be set for a particular file path, and optionally, a file type in that path.
-
-Let's say that you want to add a default layout to all pages and posts in your site. You would add this to your `_config.yml` file:
-
-```yaml
-defaults:
-  -
-    scope:
-      path: "" # an empty string here means all files in the project
-    values:
-      layout: "default"
-```
-
-<div class="note info">
-  <h5>Please stop and rerun `jekyll serve` command.</h5>
-  <p>
-    The <code>_config.yml</code> master configuration file contains global configurations
-    and variable definitions that are read once at execution time. Changes made to <code>_config.yml</code>
-    during automatic regeneration are not loaded until the next execution.
-  </p>
-  <p>
-    Note <a href="../datafiles">Data Files</a> are included and reloaded during automatic regeneration.
-  </p>
-</div>
-
-Here, we are scoping the `values` to any file that exists in the path `scope`. Since the path is set as an empty string, it will apply to **all files** in your project. You probably don't want to set a layout on every file in your project - like css files, for example - so you can also specify a `type` value under the `scope` key.
-
-```yaml
-defaults:
-  -
-    scope:
-      path: "" # an empty string here means all files in the project
-      type: "posts" # previously `post` in Jekyll 2.2.
-    values:
-      layout: "default"
-```
-
-Now, this will only set the layout for files where the type is `posts`.
-The different types that are available to you are `pages`, `posts`, `drafts` or any collection in your site. While `type` is optional, you must specify a value for `path` when creating a `scope/values` pair.
-
-As mentioned earlier, you can set multiple scope/values pairs for `defaults`.
-
-```yaml
-defaults:
-  -
-    scope:
-      path: ""
-      type: "pages"
-    values:
-      layout: "my-site"
-  -
-    scope:
-      path: "projects"
-      type: "pages" # previously `page` in Jekyll 2.2.
-    values:
-      layout: "project" # overrides previous default layout
-      author: "Mr. Hyde"
-```
-
-With these defaults, all pages would use the `my-site` layout. Any html files that exist in the `projects/` folder will use the `project` layout, if it exists. Those files will also have the `page.author` [liquid variable](../variables/) set to `Mr. Hyde`.
-
-```yaml
-collections:
-  my_collection:
-    output: true
-
-defaults:
-  -
-    scope:
-      path: ""
-      type: "my_collection" # a collection in your site, in plural form
-    values:
-      layout: "default"
-```
-
-In this example, the `layout` is set to `default` inside the
-[collection](../collections/) with the name `my_collection`.
-
-### Glob patterns in Front Matter defaults
-
-It is also possible to use glob patterns (currently limited to patterns that contain `*`) when matching defaults. For example, it is possible to set specific layout for each `special-page.html` in any subfolder of `section` folder. {%- include docs_version_badge.html version="3.7.0" -%}
-
-```yaml
-collections:
-  my_collection:
-    output: true
-
-defaults:
-  -
-    scope:
-      path: "section/*/special-page.html"
-    values:
-      layout: "specific-layout"
-```
-
-<div class="note warning">
-  <h5>Globbing and Performance</h5>
-  <p>
-    Please note that globbing a path is known to have a negative effect on
-    performance and is currently not optimized, especially on Windows.
-    Globbing a path will increase your build times in proportion to the size
-    of the associated collection directory.
-  </p>
-</div>
-
-
-### Precedence
-
-Jekyll will apply all of the configuration settings you specify in the `defaults` section of your `_config.yml` file. However, you can choose to override settings from other scope/values pair by specifying a more specific path for the scope.
-
-You can see that in the second to last example above. First, we set the default page layout to `my-site`. Then, using a more specific path, we set the default layout for pages in the `projects/` path to `project`. This can be done with any value that you would set in the page or post front matter.
-
-Finally, if you set defaults in the site configuration by adding a `defaults` section to your `_config.yml` file, you can override those settings in a post or page file. All you need to do is specify the settings in the post or page front matter. For example:
-
-```yaml
-# In _config.yml
-...
-defaults:
-  -
-    scope:
-      path: "projects"
-      type: "pages"
-    values:
-      layout: "project"
-      author: "Mr. Hyde"
-      category: "project"
-...
-```
-
-```yaml
-# In projects/foo_project.md
----
-author: "John Smith"
-layout: "foobar"
----
-The post text goes here...
-```
-
-The `projects/foo_project.md` would have the `layout` set to `foobar` instead
-of `project` and the `author` set to `John Smith` instead of `Mr. Hyde` when
-the site is built.
-
-## Default Configuration
-
-Jekyll runs with the following configuration options by default. Alternative
-settings for these options can be explicitly specified in the configuration
-file or on the command-line.
-
-<div class="note warning">
-  <h5>There are two unsupported kramdown options</h5>
-  <p>
-    Please note that both <code>remove_block_html_tags</code> and
-    <code>remove_span_html_tags</code> are currently unsupported in Jekyll due
-    to the fact that they are not included within the kramdown HTML converter.
-  </p>
-</div>
-
-```yaml
-# Where things are
-source:          .
-destination:     ./_site
-collections_dir: .
-plugins_dir:     _plugins
-layouts_dir:     _layouts
-data_dir:        _data
-includes_dir:    _includes
-collections:
-  posts:
-    output:   true
-
-# Handling Reading
-safe:                false
-include:             [".htaccess"]
-exclude:             ["Gemfile", "Gemfile.lock", "node_modules", "vendor/bundle/", "vendor/cache/", "vendor/gems/", "vendor/ruby/"]
-keep_files:          [".git", ".svn"]
-encoding:            "utf-8"
-markdown_ext:        "markdown,mkdown,mkdn,mkd,md"
-strict_front_matter: false
-
-# Filtering Content
-show_drafts: null
-limit_posts: 0
-future:      false
-unpublished: false
-
-# Plugins
-whitelist: []
-plugins:   []
-
-# Conversion
-markdown:    kramdown
-highlighter: rouge
-lsi:         false
-excerpt_separator: "\n\n"
-incremental: false
-
-# Serving
-detach:  false
-port:    4000
-host:    127.0.0.1
-baseurl: "" # does not include hostname
-show_dir_listing: false
-
-# Outputting
-permalink:     date
-paginate_path: /page:num
-timezone:      null
-
-quiet:    false
-verbose:  false
-defaults: []
-
-liquid:
-  error_mode:       warn
-  strict_filters:   false
-  strict_variables: false
-
-# Markdown Processors
-
-kramdown:
-  auto_ids:      true
-  entity_output: as_char
-  toc_levels:    1..6
-  smart_quotes:  lsquo,rsquo,ldquo,rdquo
-  input:         GFM
-  hard_wrap:     false
-  footnote_nr:   1
-  show_warnings: false
-```
-
-## Liquid Options
-
-Liquid's response to errors can be configured by setting `error_mode`. The
-options are
-
-- `lax` --- Ignore all errors.
-- `warn` --- Output a warning on the console for each error.
-- `strict` --- Output an error message and stop the build.
-
-You can also configure Liquid's renderer to catch non-assigned variables and
-non-existing filters by setting `strict_variables` and / or `strict_filters`
-to `true` respectively. {% include docs_version_badge.html version="3.8.0" %}
-
-Do note that while `error_mode` configures Liquid's parser, the `strict_variables`
-and `strict_filters` options configure Liquid's renderer and are consequently,
-mutually exclusive.
-
-## Markdown Options
-
-The various Markdown renderers supported by Jekyll sometimes have extra options
-available.
-
-### Custom Markdown Processors
-
-If you're interested in creating a custom markdown processor, you're in luck! Create a new class in the `Jekyll::Converters::Markdown` namespace:
-
-```ruby
-class Jekyll::Converters::Markdown::MyCustomProcessor
-  def initialize(config)
-    require 'funky_markdown'
-    @config = config
-  rescue LoadError
-    STDERR.puts 'You are missing a library required for Markdown. Please run:'
-    STDERR.puts '  $ [sudo] gem install funky_markdown'
-    raise FatalException.new("Missing dependency: funky_markdown")
-  end
-
-  def convert(content)
-    ::FunkyMarkdown.new(content).convert
-  end
-end
-```
-
-Once you've created your class and have it properly set up either as a plugin
-in the `_plugins` folder or as a gem, specify it in your `_config.yml`:
-
-```yaml
-markdown: MyCustomProcessor
-```
-
-## Incremental Regeneration
-<div class="note warning">
-  <h5>Incremental regeneration is still an experimental feature</h5>
-  <p>
-    While incremental regeneration will work for the most common cases, it will
-    not work correctly in every scenario. Please be extremely cautious when
-    using the feature, and report any problems not listed below by
-    <a href="https://github.com/jekyll/jekyll/issues/new">opening an issue on GitHub</a>.
-  </p>
-</div>
-
-Incremental regeneration helps shorten build times by only generating documents
-and pages that were updated since the previous build. It does this by keeping
-track of both file modification times and inter-document dependencies in the
-`.jekyll-metadata` file.
-
-Under the current implementation, incremental regeneration will only generate a
-document or page if either it, or one of its dependencies, is modified. Currently,
-the only types of dependencies tracked are includes (using the
-{% raw %}`{% include %}`{% endraw %} tag) and layouts. This means that plain
-references to other documents (for example, the common case of iterating over
-`site.posts` in a post listings page) will not be detected as a dependency.
-
-To remedy some of these shortfalls, putting `regenerate: true` in the front-matter
-of a document will force Jekyll to regenerate it regardless of whether it has been
-modified. Note that this will generate the specified document only; references
-to other documents' contents will not work since they won't be re-rendered.
-
-Incremental regeneration can be enabled via the `--incremental` flag (`-I` for
-short) from the command-line or by setting `incremental: true` in your
-configuration file.
+Jekyll gives you a lot of flexibility to customize how it builds your site. These
+options can either be specified in a `_config.yml` or `_config.toml` file placed
+in your site’s root directory, or can be specified as flags for the `jekyll`
+executable in the terminal.
+
+* [Configuration Options]({{ '/docs/configuration/options/' | relative_url }})
+* [Default Configuration]({{ '/docs/configuration/default/' | relative_url }})
+* [Front Matter Defaults]({{ '/docs/configuration/front-matter-defaults/' | relative_url }})
+* [Environments]({{ '/docs/configuration/environments/' | relative_url }})
+* [Markdown Options]({{ '/docs/configuration/markdown/' | relative_url }})
+* [Liquid Options]({{ '/docs/configuration/liquid/' | relative_url }})
+* [Webrick Options]({{ '/docs/configuration/webrick/' | relative_url }})
+* [Incremental Regeneration]({{ '/docs/configuration/incremental-regeneration/' | relative_url }})

docs/_docs/configuration/default.md

@@ -0,0 +1,89 @@
+---
+title: Default Configuration
+permalink: "/docs/configuration/default/"
+---
+
+Jekyll runs with the following configuration options by default. Alternative
+settings for these options can be explicitly specified in the configuration
+file or on the command-line.
+
+<div class="note info">
+  <h5>Be aware of directory paths</h5>
+  <p>
+    Make directory path values in configuration keys like `plugins_dir` relative to the current working directory, not the site source. 
+  </p>
+</div>
+
+```yaml
+# Where things are
+source              : .
+destination         : ./_site
+collections_dir     : .
+plugins_dir         : _plugins # takes an array of strings and loads plugins in that order
+layouts_dir         : _layouts
+data_dir            : _data
+includes_dir        : _includes
+sass:
+  sass_dir: _sass
+collections:
+  posts:
+    output          : true
+
+# Handling Reading
+safe                : false
+include             : [".htaccess"]
+exclude             : ["Gemfile", "Gemfile.lock", "node_modules", "vendor/bundle/", "vendor/cache/", "vendor/gems/", "vendor/ruby/"]
+keep_files          : [".git", ".svn"]
+encoding            : "utf-8"
+markdown_ext        : "markdown,mkdown,mkdn,mkd,md"
+strict_front_matter : false
+
+# Filtering Content
+show_drafts         : null
+limit_posts         : 0
+future              : false
+unpublished         : false
+
+# Plugins
+whitelist           : []
+plugins             : []
+
+# Conversion
+markdown            : kramdown
+highlighter         : rouge
+lsi                 : false
+excerpt_separator   : "\n\n"
+incremental         : false
+
+# Serving
+detach              : false
+port                : 4000
+host                : 127.0.0.1
+baseurl             : "" # does not include hostname
+show_dir_listing    : false
+
+# Outputting
+permalink           : date
+paginate_path       : /page:num
+timezone            : null
+
+quiet               : false
+verbose             : false
+defaults            : []
+
+liquid:
+  error_mode        : warn
+  strict_filters    : false
+  strict_variables  : false
+
+# Markdown Processors
+kramdown:
+  auto_ids          : true
+  entity_output     : as_char
+  toc_levels        : [1, 2, 3, 4, 5, 6]
+  smart_quotes      : lsquo,rsquo,ldquo,rdquo
+  input             : GFM
+  hard_wrap         : false
+  footnote_nr       : 1
+  show_warnings     : false
+```

docs/_docs/configuration/environments.md

@@ -0,0 +1,49 @@
+---
+title: Environments
+permalink: "/docs/configuration/environments/"
+---
+In the `build` (or `serve`) arguments, you can specify a Jekyll environment
+and value. The build will then apply this value in any conditional statements
+in your content.
+
+For example, suppose you set this conditional statement in your code:
+
+{% raw %}
+```liquid
+{% if jekyll.environment == "production" %}
+   {% include disqus.html %}
+{% endif %}
+```
+{% endraw %}
+
+When you build your Jekyll site, the content inside the `if` statement won't be
+run unless you also specify a `production` environment in the build command,
+like this:
+
+```sh
+JEKYLL_ENV=production jekyll build
+```
+
+Specifying an environment value allows you to make certain content available
+only within specific environments.
+
+The default value for `JEKYLL_ENV` is `development`. Therefore if you omit
+`JEKYLL_ENV` from the build arguments, the default value will be
+`JEKYLL_ENV=development`. Any content inside
+{% raw %}`{% if jekyll.environment == "development" %}`{% endraw %} tags will
+automatically appear in the build.
+
+Your environment values can be anything you want (not just `development` or
+`production`). Some elements you might want to hide in development
+environments include Disqus comment forms or Google Analytics. Conversely,
+you might want to expose an "Edit me in GitHub" button in a development
+environment but not include it in production environments.
+
+By specifying the option in the build command, you avoid having to change
+values in your configuration files when moving from one environment to another.
+
+{: .note}
+To switch part of your config settings depending on the environment, use the
+<a href="{{ '/docs/configuration/options/#build-command-options' | relative_url }}">build command option</a>,
+for example <code>--config _config.yml,_config_development.yml</code>. Settings
+in later files override settings in earlier files.

docs/_docs/configuration/front-matter-defaults.md

@@ -0,0 +1,153 @@
+---
+title: Front Matter Defaults
+permalink: "/docs/configuration/front-matter-defaults/"
+---
+
+Using [front matter](/docs/front-matter/) is one way that you can specify configuration in the pages and posts for your site. Setting things like a default layout, or customizing the title, or specifying a more precise date/time for the post can all be added to your page or post front matter.
+
+Often times, you will find that you are repeating a lot of configuration options. Setting the same layout in each file, adding the same category - or categories - to a post, etc. You can even add custom variables like author names, which might be the same for the majority of posts on your blog.
+
+Instead of repeating this configuration each time you create a new post or page, Jekyll provides a way to set these defaults in the site configuration. To do this, you can specify site-wide defaults using the `defaults` key in the `_config.yml` file in your project's root directory.
+
+The `defaults` key holds an array of scope/values pairs that define what defaults should be set for a particular file path, and optionally, a file type in that path.
+
+Let's say that you want to add a default layout to all pages and posts in your site. You would add this to your `_config.yml` file:
+
+```yaml
+defaults:
+  -
+    scope:
+      path: "" # an empty string here means all files in the project
+    values:
+      layout: "default"
+```
+
+<div class="note info">
+  <h5>Stop and rerun `jekyll serve` command.</h5>
+  <p>
+    The <code>_config.yml</code> master configuration file contains global configurations
+    and variable definitions that are read once at execution time. Changes made to <code>_config.yml</code>
+    during automatic regeneration are not loaded until the next execution.
+  </p>
+  <p>
+    Note <a href="{{ '/docs/datafiles' | relative_url }}">Data Files</a> are included and reloaded during automatic regeneration.
+  </p>
+</div>
+
+Here, we are scoping the `values` to any file that exists in the path `scope`. Since the path is set as an empty string, it will apply to **all files** in your project. You probably don't want to set a layout on every file in your project - like css files, for example - so you can also specify a `type` value under the `scope` key.
+
+```yaml
+defaults:
+  -
+    scope:
+      path: "" # an empty string here means all files in the project
+      type: "posts" # previously `post` in Jekyll 2.2.
+    values:
+      layout: "default"
+```
+
+Now, this will only set the layout for files where the type is `posts`.
+The different types that are available to you are `pages`, `posts`, `drafts` or any collection in your site. While `type` is optional, you must specify a value for `path` when creating a `scope/values` pair.
+
+As mentioned earlier, you can set multiple scope/values pairs for `defaults`.
+
+```yaml
+defaults:
+  -
+    scope:
+      path: ""
+      type: "pages"
+    values:
+      layout: "my-site"
+  -
+    scope:
+      path: "projects"
+      type: "pages" # previously `page` in Jekyll 2.2.
+    values:
+      layout: "project" # overrides previous default layout
+      author: "Mr. Hyde"
+```
+
+With these defaults, all pages would use the `my-site` layout. Any html files that exist in the `projects/`
+folder will use the `project` layout, if it exists. Those files will also have the `page.author`
+[liquid variable]({{ '/docs/variables/' | relative_url }}) set to `Mr. Hyde`.
+
+```yaml
+collections:
+  my_collection:
+    output: true
+
+defaults:
+  -
+    scope:
+      path: ""
+      type: "my_collection" # a collection in your site, in plural form
+    values:
+      layout: "default"
+```
+
+In this example, the `layout` is set to `default` inside the
+[collection]({{ '/docs/collections/' | relative_url }}) with the name `my_collection`.
+
+### Glob patterns in Front Matter defaults
+
+It is also possible to use glob patterns (currently limited to patterns that contain `*`) when matching defaults. For example, it is possible to set specific layout for each `special-page.html` in any subfolder of `section` folder. {%- include docs_version_badge.html version="3.7.0" -%}
+
+```yaml
+collections:
+  my_collection:
+    output: true
+
+defaults:
+  -
+    scope:
+      path: "section/*/special-page.html"
+    values:
+      layout: "specific-layout"
+```
+
+<div class="note warning">
+  <h5>Globbing and Performance</h5>
+  <p>
+    Please note that globbing a path is known to have a negative effect on
+    performance and is currently not optimized, especially on Windows.
+    Globbing a path will increase your build times in proportion to the size
+    of the associated collection directory.
+  </p>
+</div>
+
+### Precedence
+
+Jekyll will apply all of the configuration settings you specify in the `defaults` section of your `_config.yml` file. You can choose to override settings from other scope/values pair by specifying a more specific path for the scope.
+
+You can see that in the second to last example above. First, we set the default page layout to `my-site`. Then, using a more specific path, we set the default layout for pages in the `projects/` path to `project`. This can be done with any value that you would set in the page or post front matter.
+
+Finally, if you set defaults in the site configuration by adding a `defaults` section to your `_config.yml` file, you can override those settings in a post or page file. All you need to do is specify the settings in the post or page front matter. For example:
+
+```yaml
+# In _config.yml
+...
+defaults:
+  -
+    scope:
+      path: "projects"
+      type: "pages"
+    values:
+      layout: "project"
+      author: "Mr. Hyde"
+      category: "project"
+...
+```
+
+```yaml
+# In projects/foo_project.md
+---
+author: "John Smith"
+layout: "foobar"
+---
+The post text goes here...
+```
+
+The `projects/foo_project.md` would have the `layout` set to `foobar` instead
+of `project` and the `author` set to `John Smith` instead of `Mr. Hyde` when
+the site is built.

docs/_docs/configuration/incremental-regeneration.md

@@ -0,0 +1,36 @@
+---
+title: Default Configuration
+permalink: "/docs/configuration/incremental-regeneration/"
+---
+
+## Incremental Regeneration
+<div class="note warning">
+  <h5>Incremental regeneration is still an experimental feature</h5>
+  <p>
+    While incremental regeneration will work for the most common cases, it will
+    not work correctly in every scenario. Please be extremely cautious when
+    using the feature, and report any problems not listed below by
+    <a href="https://github.com/jekyll/jekyll/issues/new">opening an issue on GitHub</a>.
+  </p>
+</div>
+
+Incremental regeneration helps shorten build times by only generating documents
+and pages that were updated since the previous build. It does this by keeping
+track of both file modification times and inter-document dependencies in the
+`.jekyll-metadata` file.
+
+Under the current implementation, incremental regeneration will only generate a
+document or page if either it, or one of its dependencies, is modified. Currently,
+the only types of dependencies tracked are includes (using the
+{% raw %}`{% include %}`{% endraw %} tag) and layouts. This means that plain
+references to other documents (for example, the common case of iterating over
+`site.posts` in a post listings page) will not be detected as a dependency.
+
+To remedy some of these shortfalls, putting `regenerate: true` in the front-matter
+of a document will force Jekyll to regenerate it regardless of whether it has been
+modified. Note that this will generate the specified document only; references
+to other documents' contents will not work since they won't be re-rendered.
+
+Incremental regeneration can be enabled via the `--incremental` flag (`-I` for
+short) from the command-line or by setting `incremental: true` in your
+configuration file.

docs/_docs/configuration/liquid.md

@@ -0,0 +1,38 @@
+---
+title: Liquid Options
+permalink: "/docs/configuration/liquid/"
+---
+Liquid's response to errors can be configured by setting `error_mode`. The
+options are
+
+- `lax` --- Ignore all errors.
+- `warn` --- Output a warning on the console for each error. (default)
+- `strict` --- Output an error message and stop the build.
+
+Within _config.yml, the default configuration is as follows:
+
+```yaml
+liquid:
+  error_mode: warn
+```
+
+The above example depicts the "warn" value, which is already set by default- `error_mode: warn`. This results in any issues being called out during the build process however will continue to build if possible.
+
+You can also configure Liquid's renderer to catch non-assigned variables and
+non-existing filters by setting `strict_variables` and / or `strict_filters`
+to `true` respectively. {% include docs_version_badge.html version="3.8.0" %}
+
+Do note that while `error_mode` configures Liquid's parser, the `strict_variables`
+and `strict_filters` options configure Liquid's renderer and are consequently,
+mutually exclusive.
+
+An example of setting these variables within _config.yml is as follows:
+
+```yaml
+liquid:
+  error_mode: strict
+  strict_variables: true
+  strict_filters: true
+```
+
+Configuring as described above will stop your build/serve from happening and call out the offending error and halt. This is helpful when desiring to catch liquid-related issues by stopping the build or serve process and allowing you to deal with any issues.

docs/_docs/configuration/markdown.md

@@ -0,0 +1,94 @@
+---
+title: Markdown Options
+permalink: "/docs/configuration/markdown/"
+---
+The various Markdown renderers supported by Jekyll sometimes have extra options
+available.
+
+### Kramdown
+
+Kramdown is the default Markdown renderer for Jekyll. Below is a list of the
+currently supported options:
+
+* **auto_id_prefix** - Prefix used for automatically generated header IDs
+* **auto_id_stripping** - Strip all formatting from header text for automatic ID generation
+* **auto_ids** - Use automatic header ID generation
+* **coderay_bold_every** - Defines how often a line number should be made bold
+* **coderay_css** - Defines how the highlighted code gets styled
+* **coderay_default_lang** - Sets the default language for highlighting code blocks
+* **coderay_line_number_start** - The start value for the line numbers
+* **coderay_line_numbers** - Defines how and if line numbers should be shown
+* **coderay_tab_width** - The tab width used in highlighted code
+* **coderay_wrap** - Defines how the highlighted code should be wrapped
+* **enable_coderay** - Use coderay for syntax highlighting
+* **entity_output** - Defines how entities are output
+* **footnote_backlink** - Defines the text that should be used for the footnote backlinks
+* **footnote_backlink_inline** - Specifies whether the footnote backlink should always be inline
+* **footnote_nr** - The number of the first footnote
+* **gfm_quirks** - Enables a set of GFM specific quirks
+* **hard_wrap** - Interprets line breaks literally
+* **header_offset** - Sets the output offset for headers
+* **html_to_native** - Convert HTML elements to native elements
+* **line_width** - Defines the line width to be used when outputting a document
+* **link_defs** - Pre-defines link definitions
+* **math_engine** - Set the math engine
+* **math_engine_opts** - Set the math engine options
+* **parse_block_html** - Process kramdown syntax in block HTML tags
+* **parse_span_html** - Process kramdown syntax in span HTML tags
+* **smart_quotes** - Defines the HTML entity names or code points for smart quote output
+* **syntax_highlighter** - Set the syntax highlighter
+* **syntax_highlighter_opts** - Set the syntax highlighter options
+* **toc_levels** - Defines the levels that are used for the table of contents
+* **transliterated_header_ids** - Transliterate the header text before generating the ID
+* **typographic_symbols** - Defines a mapping from typographical symbol to output characters
+
+### Example Usage
+```yaml
+kramdown:
+  html_to_native: true
+```
+  
+<div class="note warning">
+  <h5>There are two unsupported kramdown options</h5>
+  <p>
+    Please note that both <code>remove_block_html_tags</code> and
+    <code>remove_span_html_tags</code> are currently unsupported in Jekyll due
+    to the fact that they are not included within the kramdown HTML converter.
+  </p>
+</div>
+
+For more details about these options have a look at the [Kramdown configuration documentation](https://kramdown.gettalong.org/options.html).
+
+### CommonMark
+
+[CommonMark](https://commonmark.org/) is a rationalized version of Markdown syntax, implemented in C and thus faster than default Kramdown implemented in Ruby. It [slightly differs](https://github.com/commonmark/CommonMark#differences-from-original-markdown) from original Markdown and does not support all the syntax elements implemented in Kramdown, like [Block Inline Attribute Lists](https://kramdown.gettalong.org/syntax.html#block-ials).
+
+It comes in two flavors: basic CommonMark with [jekyll-commonmark](https://github.com/jekyll/jekyll-commonmark) plugin and [GitHub Flavored Markdown supported by GitHub Pages](https://github.com/github/jekyll-commonmark-ghpages).
+
+### Custom Markdown Processors
+
+If you're interested in creating a custom markdown processor, you're in luck! Create a new class in the `Jekyll::Converters::Markdown` namespace:
+
+```ruby
+class Jekyll::Converters::Markdown::MyCustomProcessor
+  def initialize(config)
+    require 'funky_markdown'
+    @config = config
+  rescue LoadError
+    STDERR.puts 'You are missing a library required for Markdown. Please run:'
+    STDERR.puts '  $ [sudo] gem install funky_markdown'
+    raise FatalException.new("Missing dependency: funky_markdown")
+  end
+
+  def convert(content)
+    ::FunkyMarkdown.new(content).convert
+  end
+end
+```
+
+Once you've created your class and have it properly set up either as a plugin
+in the `_plugins` folder or as a gem, specify it in your `_config.yml`:
+
+```yaml
+markdown: MyCustomProcessor
+```

docs/_docs/configuration/options.md

@@ -0,0 +1,162 @@
+---
+title: Configuration Options
+permalink: "/docs/configuration/options/"
+---
+
+The tables below list the available settings for Jekyll, and the various <code
+class="option">options</code> (specified in the configuration file) and <code
+class="flag">flags</code> (specified on the command-line) that control them.
+
+### Global Configuration
+
+<div class="mobile-side-scroller">
+<table>
+  <thead>
+    <tr>
+      <th>Setting</th>
+      <th>
+        <span class="option">Options</span> and <span class="flag">Flags</span>
+      </th>
+    </tr>
+  </thead>
+  <tbody>
+    {% for setting in site.data.config_options.global %}
+      <tr class="setting">
+        <td>
+          <p class="name">
+            <strong>{{ setting.name }}</strong>
+            {% if setting.version-badge %}
+              <span class="version-badge" title="Introduced in v{{ setting.version-badge }}">{{ setting.version-badge }}</span>
+            {% endif %}
+          </p> 
+          <p class="description">{{ setting.description }}</p>
+        </td> 
+        <td class="align-center">
+          <p><code class="option">{{ setting.option }}</code></p>
+          {% if setting.flag %}
+            <p><code class="flag">{{ setting.flag }}</code></p>
+          {% endif %}
+        </td>
+      </tr>
+    {% endfor %}
+    <tr>
+      <td>
+        <p class='name'><strong>Defaults</strong></p>
+        <p class='description'>
+            Set defaults for <a href="{{ '/docs/front-matter/' | relative_url }}" title="front matter">front matter</a>
+            variables.
+        </p>
+      </td>
+      <td class='align-center'>
+        <p>see <a href="{{ '/docs/configuration/front-matter-defaults/' | relative_url }}" title="details">below</a></p>
+      </td>
+    </tr>
+  </tbody>
+</table>
+</div>
+
+<div class="note warning">
+  <h5>Destination folders are cleaned on site builds</h5>
+  <p>
+    The contents of <code>&lt;destination&gt;</code> are automatically
+    cleaned, by default, when the site is built. Files or folders that are not
+    created by your site will be removed. Some files could be retained
+    by specifying them within the <code>&lt;keep_files&gt;</code> configuration directive.
+  </p>
+  <p>
+    Do not use an important location for <code>&lt;destination&gt;</code>; instead, use it as
+    a staging area and copy files from there to your web server.
+  </p>
+</div>
+
+### Build Command Options
+
+<div class="mobile-side-scroller">
+<table>
+  <thead>
+    <tr>
+      <th>Setting</th>
+      <th><span class="option">Options</span> and <span class="flag">Flags</span></th>
+    </tr>
+  </thead>
+  <tbody>
+    {% for setting in site.data.config_options.build %}
+      <tr class="setting">
+        <td>
+          <p class="name">
+            <strong>{{ setting.name }}</strong>
+            {% if setting.version-badge %}
+              <span class="version-badge" title="Introduced in v{{ setting.version-badge }}">{{ setting.version-badge }}</span>
+            {% endif %}
+          </p> 
+          <p class="description">{{ setting.description }}</p>
+        </td> 
+        <td class="align-center">
+          {% if setting.option %}<p><code class="option">{{ setting.option }}</code></p>{% endif %}
+          {% if setting.flag %}<p><code class="flag">{{ setting.flag }}</code></p>{% endif %}
+        </td>
+      </tr>
+    {% endfor %}
+  </tbody>
+</table>
+</div>
+
+### Serve Command Options
+
+In addition to the options below, the `serve` sub-command can accept any of the options
+for the `build` sub-command, which are then applied to the site build which occurs right
+before your site is served.
+
+<div class="mobile-side-scroller">
+<table>
+  <thead>
+    <tr>
+      <th>Setting</th>
+      <th><span class="option">Options</span> and <span class="flag">Flags</span></th>
+    </tr>
+  </thead>
+  <tbody>
+    {% for setting in site.data.config_options.serve %}
+      <tr class="setting">
+        <td>
+          <p class="name">
+            <strong>{{ setting.name }}</strong>
+            {% if setting.version-badge %}
+              <span class="version-badge" title="Introduced in v{{ setting.version-badge }}">{{ setting.version-badge }}</span>
+            {% endif %}
+          </p> 
+          <p class="description">{{ setting.description }}</p>
+        </td> 
+        <td class="align-center">
+          {% if setting.option %}
+            <p><code class="option">{{ setting.option }}</code></p>
+          {% elsif setting.options %}
+            <p>
+              {% for option in setting.options %}
+                <code class="option">{{ option }}</code><br>
+              {% endfor %}
+            </p>
+          {% endif %}
+          {% if setting.flag %}
+            <p><code class="flag">{{ setting.flag }}</code></p>
+          {% elsif setting.flags %}
+            <p>
+            {% for flag in setting.flags %}
+              <code class="flag">{{ flag }}</code><br>
+            {% endfor %}
+            </p>
+          {% endif %}
+        </td>
+      </tr>
+    {% endfor %}
+  </tbody>
+</table>
+</div>
+
+<div class="note warning">
+  <h5>Do not use tabs in configuration files</h5>
+  <p>
+    This will either lead to parsing errors, or Jekyll will revert to the
+    default settings. Use spaces instead.
+  </p>
+</div>

docs/_docs/configuration/webrick.md

@@ -0,0 +1,20 @@
+---
+title: WEBrick Options
+permalink: "/docs/configuration/webrick/"
+---
+You can provide custom headers for your site by adding them to `_config.yml`
+
+```yaml
+# File: _config.yml
+webrick:
+  headers:
+    My-Header: My-Value
+    My-Other-Header: My-Other-Value
+```
+
+### Defaults
+
+Jekyll provides by default `Content-Type` and `Cache-Control` response
+headers: one dynamic in order to specify the nature of the data being served,
+the other static in order to disable caching so that you don't have to fight
+with Chrome's aggressive caching when you are in development mode.

docs/_docs/continuous-integration/buddyworks.md

@@ -21,8 +21,6 @@ title: "Buddy"
 
 Whenever you make a push to the selected branch, the Jekyll action runs `jekyll build` in an isolated [Jekyll Docker image][jekyll-docker-image]. The output is generated to the `/filesystem` directory, and can be further deployed to FTP/SFTP and IaaS services. You can add your own commands, install additional packages, attach services, and run Selenium tests, as well as add other actions down the pipeline, eg. a Slack notification or an SSH script that will restart your server.
 
-![Jekyll Build](https://buddy.works/data/blog/_images/buddyworks-jekyll-small.png)
-
 [jekyll-docker-image]: https://hub.docker.com/r/jekyll/jekyll/
 
 ## 3. Using YAML for configuration

docs/_docs/continuous-integration/circleci.md

@@ -12,7 +12,7 @@ Building, testing, and deploying your Jekyll-generated website can quickly be do
 
 To start building your project on CircleCI, all you need to do is 'follow' your project from CircleCI's website:
 
-1. Visit the 'Add Projects' page: <https://circleci.com/add-projects>
+1. Visit the 'Add Projects' page
 1. From the GitHub or Bitbucket tab on the left, choose a user or organization.
 1. Find your project in the list and click 'Build project' on the right.
 1. The first build will start on its own. You can start telling CircleCI how to build your project by creating a [circle.yml][3] file in the root of your repository.
@@ -34,11 +34,11 @@ gem 'jekyll'
 gem 'html-proofer'
 ```
 
-CircleCI detects when `Gemfile` is present is will automatically run `bundle install` for you in the `dependencies` phase.
+CircleCI detects when `Gemfile` is present and will automatically run `bundle install` for you in the `dependencies` phase.
 
 ## 3. Testing
 
-The most basic test that can be run is simply seeing if `jekyll build` actually works. This is a blocker, a dependency if you will,  for other tests you might run on the generate site. So we'll run Jekyll, via Bundler, in the `dependencies` phase.
+The most basic test that can be run is seeing if `jekyll build` actually works. This is a blocker, a dependency if you will, for other tests you might run on the generate site. So we'll run Jekyll, via Bundler, in the `dependencies` phase.
 
 ```yaml
 dependencies:
@@ -61,26 +61,75 @@ test:
 
 ## Complete Example circle.yml File
 
-When you put it all together, here's an example of what that `circle.yml` file could look like:
+Since v2, CircleCI is a Docker-based system. The example `circle.yml` below demonstrates how to
+deploy your Jekyll project to AWS. In order for this to work you would first have to set the
+`S3_BUCKET_NAME` [environment variable](https://circleci.com/docs/2.0/env-vars/).
 
 ```yaml
-machine:
-  environment:
-    NOKOGIRI_USE_SYSTEM_LIBRARIES: true # speeds up installation of html-proofer
-
-dependencies:
-  post:
-    - bundle exec jekyll build
-
-test:
-  post:
-    - bundle exec htmlproofer ./_site --allow-hash-href --check-favicon --check-html --disable-external
-
-deployment:
-  prod:
-    branch: master
-    commands:
-      - rsync -va --delete ./_site username@my-website:/var/html
+defaults: &defaults
+  working_directory: ~/repo
+version: 2
+jobs:
+  build:
+    <<: *defaults
+    docker:
+      - image: circleci/ruby:2.5
+    environment:
+      BUNDLE_PATH: ~/repo/vendor/bundle
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - rubygems-v1-{% raw %}{{ checksum "Gemfile.lock" }}{% endraw %}
+            - rubygems-v1-fallback
+      - run:
+          name: Bundle Install
+          command: bundle check || bundle install
+      - save_cache:
+          key: rubygems-v1-{% raw %}{{ checksum "Gemfile.lock" }}{% endraw %}
+          paths:
+            - vendor/bundle
+      - run:
+          name: Jekyll build
+          command: bundle exec jekyll build
+      - run:
+          name: HTMLProofer tests
+          command: |
+            bundle exec htmlproofer ./_site \
+              --allow-hash-href \
+              --check-favicon  \
+              --check-html \
+              --disable-external
+      - persist_to_workspace:
+          root: ./
+          paths:
+            - _site
+  deploy:
+    <<: *defaults
+    docker:
+      - image: circleci/python:3.6.3
+    environment:
+      S3_BUCKET_NAME: <<YOUR BUCKET NAME HERE>>
+    steps:
+      - attach_workspace:
+          at: ./
+      - run:
+          name: Install AWS CLI
+          command: pip install awscli --upgrade --user
+      - run:
+          name: Upload to s3
+          command: ~/.local/bin/aws s3 sync ./_site s3://$S3_BUCKET_NAME/ --delete --acl public-read
+workflows:
+  version: 2
+  test-deploy:
+    jobs:
+      - build
+      - deploy:
+          requires:
+            - build
+          filters:
+            branches:
+              only: master
 ```
 
 ## Questions?

docs/_docs/continuous-integration/github-actions.md

@@ -0,0 +1,213 @@
+---
+title: GitHub Actions
+---
+
+When building a Jekyll site with GitHub Pages, the standard flow is restricted for security reasons
+and to make it simpler to get a site setup. For more control over the build and still host the site
+with GitHub Pages you can use GitHub Actions.
+
+
+## Advantages of using Actions
+
+### Control over gemset
+
+- **Jekyll version** --- Instead of using the currently enabled version at `3.9.0`, you can use any
+  version of Jekyll you want. For example `4.0.0`, or point directly to the repository.
+- **Plugins** --- You can use any Jekyll plugins irrespective of them being on the
+  [supported versions][ghp-whitelist] list, even `*.rb` files placed in the `_plugins` directory
+  of your site.
+- **Themes** --- While using a custom theme is possible without Actions, it is now simpler.
+
+### Workflow Management
+
+- **Customization** --- By creating a workflow file to run Actions, you can specify custom build
+  steps, use environment variables.
+- **Logging** --- The build log is visible and can be tweaked to be verbose, so it is much easier to
+  debug errors using Actions.
+
+
+## Workspace setup
+
+The first and foremost requirement is a Jekyll project hosted at GitHub. Choose an existing Jekyll
+project or follow the [Quickstart]({{ '/docs' | relative_url }}) and push the repository to GitHub
+if it is not hosted there already.
+
+We're only going to cover builds from the `master` branch in this page. Therefore, ensure that you
+are working on the `master` branch. If necessary, you may create it based on your default branch.
+When the Action builds your site, the contents of the *destination* directory will be automatically
+pushed to the `gh-pages` branch with a commit, ready to be used for serving.
+
+{: .note .warning}
+The Action we're using here will create (or reset an existing) `gh-pages` branch on every successful
+deploy.<br/> So, if you have an existing `gh-pages` branch that is used to deploy your production
+build, ensure to make a backup of the contents into a different branch so that you can rollback
+easily if necessary.
+
+The Jekyll site we'll be using for the rest of this page initially consists of just a `_config.yml`,
+an `index.md` page and a `Gemfile`. The contents are respectively:
+
+```yaml
+# _config.yml
+
+title: "Jekyll Actions Demo"
+```
+
+{% raw %}
+```liquid
+---
+---
+
+Welcome to My Home Page
+
+{% assign date = '2020-04-13T10:20:00Z' %}
+
+- Original date - {{ date }}
+- With timeago filter - {{ date | timeago }}
+```
+{% endraw %}
+
+
+```ruby
+# Gemfile
+
+source 'https://rubygems.org'
+
+gem 'jekyll', '~> 4.0'
+
+group :jekyll_plugins do
+  gem 'jekyll-timeago', '~> 0.13.1'
+end
+```
+
+{: .note .info}
+The demo site uses Jekyll 4 and a [third-party plugin][timeago-plugin], both of which are currently
+not whitelisted for use on GitHub pages. The plugin will allow us to describe how far back a date
+was from today. e.g. If we give a date as `2016-03-23T10:20:00Z` and the current date is
+`2020-04-13T10:20:00Z`, then the output would be `4 years and 3 weeks ago`.
+
+{: .note .info}
+The action we're using takes care of installing the Ruby gems and dependencies. While that keeps
+the setup simple for the user, one may encounter issues if they also check-in `Gemfile.lock` if it
+was generated with an old version of Bundler.
+
+### Setting up the Action
+
+GitHub Actions are registered for a repository by using a YAML file inside the directory path
+`.github/workflows` (note the dot at the start). Here we shall employ
+[Jekyll Actions][jekyll-actions] from the Marketplace for its simplicity.
+
+Create a **workflow file**, say `github-pages.yml`, using either the GitHub interface or by pushing
+a YAML file to the workflow directory path manually. The base contents are:
+
+{% raw %}
+```yaml
+name: Build and deploy Jekyll site to GitHub Pages
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  github-pages:
+    runs-on: ubuntu-16.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: helaili/jekyll-action@2.0.1
+        env:
+          JEKYLL_PAT: ${{ secrets.JEKYLL_PAT }}
+```
+{% endraw %}
+
+The above workflow can be explained as the following:
+
+- We trigger the build using **on.push** condition for `master` branch only --- this prevents
+  the Action from overwriting the `gh-pages` branch on any feature branch pushes.
+- The **name** of the job matches our YAML filename: `github-pages`.
+- The **checkout** action takes care of cloning your repository.
+- We specify our selected **action** and **version number** using `helaili/jekyll-action@2.0.0`.
+  This handles the build and deploy.
+- We set a reference to a secret **environment variable** for the action to use. The `JEKYLL_PAT`
+  is a *Personal Access Token* and is detailed in the next section.
+
+Instead of using the **on.push** condition, you could trigger your build on a **schedule** by 
+using the [on.schedule] parameter. For example, here we build daily at midnight by specifying
+**cron** syntax, which can be tested at the [crontab guru] site.
+
+```yaml
+on:
+  schedule:
+    - cron:  '0 0 * * *'
+```
+
+Note that this string must be quoted to prevent the asterisks from being evaluated incorrectly.
+
+[on.schedule]: https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#onschedule
+[crontab guru]: https://crontab.guru/
+
+
+### Providing permissions
+
+The action needs permissions to push to your `gh-pages` branch. So you need to create a GitHub
+**authentication token** on your GitHub profile, then set it as an environment variable in your
+build using _Secrets_:
+
+1. On your GitHub profile, under **Developer Settings**, go to the [Personal Access Tokens][tokens]
+   section.
+2. **Create** a token. Give it a name like "GitHub Actions" and ensure it has permissions to
+   `public_repos` (or the entire `repo` scope for private repository) --- necessary for the action
+   to commit to the `gh-pages` branch.
+3. **Copy** the token value.
+4. Go to your repository's **Settings** and then the **Secrets** tab.
+5. **Create** a token named `JEKYLL_PAT` (*important*). Give it a value using the value copied
+   above.
+
+### Build and deploy
+
+On pushing any local changes onto `master`, the action will be triggered and the build will
+**start**.
+
+To watch the progress and see any build errors, check on the build **status** using one of the
+following approaches:
+
+- **View by commit**
+    - Go to the repository level view in GitHub. Under the most recent commit (near the top) you’ll
+      see a **status symbol** next to the commit message as a tick or _X_. Hover over it and click
+      the **details** link.
+- **Actions tab**
+    - Go to the repository's Actions tab. Click on the `jekyll` workflow tab.
+
+If all goes well, all steps will be green and the built assets will now exist on the `gh-pages`
+branch.
+
+On a successful build, GitHub Pages will **publish** the site stored on the repository `gh-pages`
+branches. Note that you do not need to setup a `gh-pages` branch or enable GitHub Pages, as the
+action will take care of this for you.
+(For private repositories, you'll have to upgrade to a paid plan).
+
+To see the **live site**:
+
+1. Go to the **environment** tab on your repository.
+2. Click **View Deployment** to see the deployed site URL.
+3. View your site at the **URL**. Make sure the `timeago` filter works as expected.
+4. Optionally **add** this URL to your repository's main page and to your `README.md`, to make it
+   easy for people to find.
+
+When you need to make further **changes** to the site, commit to `master` and push. The workflow
+will build and deploy your site again.
+
+Be sure **not to edit** the `gh-pages` branch directly, as any changes will be lost on the next
+successful deploy from the Action.
+
+## External links
+
+- [jekyll-actions] is an action available on the GitHub Marketplace and was used in this guide.
+- [jekyll-actions-quickstart] is an unofficial repository that includes a live demo of the
+  `jekyll-actions` action. That project can be used as a template for making a new site.
+
+
+[ghp-whitelist]: https://pages.github.com/versions/
+[timeago-plugin]: https://rubygems.org/gems/jekyll-timeago
+[tokens]: https://github.com/settings/tokens
+[jekyll-actions]: https://github.com/marketplace/actions/jekyll-actions
+[jekyll-actions-quickstart]: https://github.com/MichaelCurrin/jekyll-actions-quickstart

docs/_docs/continuous-integration/index.md

@@ -1,10 +0,0 @@
----
-title: Continuous Integration
-permalink: /docs/continuous-integration/
----
-
-Continuous Integration (CI) enables you to publish your Jekyll generated website with confidence by automating the quality assurance and deployment processes. You can quickly get started using CI with one of the providers below:
-
-* [Travis CI](travis-ci)
-* [CircleCI](circleci)
-* [Buddy](buddyworks)

docs/_docs/continuous-integration/travis-ci.md

@@ -2,7 +2,7 @@
 title: "Travis CI"
 ---
 
-You can easily test your website build against one or more versions of Ruby.
+You can test your website build against one or more versions of Ruby.
 The following guide will show you how to set up a free build environment on
 [Travis][travis], with [GitHub][github] integration for pull requests.
 
@@ -11,7 +11,7 @@ The following guide will show you how to set up a free build environment on
 
 ## 1. Enabling Travis and GitHub
 
-Enabling Travis builds for your GitHub repository is pretty simple:
+To enable Travis builds for your GitHub repository:
 
 1. Go to your profile on travis-ci.org: https://travis-ci.org/profile/username
 2. Find the repository for which you're interested in enabling builds.
@@ -21,7 +21,7 @@ Enabling Travis builds for your GitHub repository is pretty simple:
 
 ## 2. The Test Script
 
-The simplest test script simply runs `jekyll build` and ensures that Jekyll
+The simplest test script runs `jekyll build` and ensures that Jekyll
 doesn't fail to build the site. It doesn't check the resulting site, but it
 does ensure things are built properly.
 
@@ -34,7 +34,7 @@ Save the commands you want to run and succeed in a file: `./script/cibuild`
 
 ### The HTML Proofer Executable
 
-```sh
+```bash
 #!/usr/bin/env bash
 set -e # halt script on error
 
@@ -76,7 +76,7 @@ with Ruby and requires RubyGems to install, we use the Ruby language build
 environment. Below is a sample `.travis.yml` file, followed by
 an explanation of each line.
 
-**Note:** You will need a Gemfile as well, [Travis will automatically install](https://docs.travis-ci.com/user/languages/ruby/#Dependency-Management) the dependencies based on the referenced gems:
+**Note:** You will need a Gemfile as well, [Travis will automatically install](https://docs.travis-ci.com/user/languages/ruby/#Dependency-Management) the dependencies based on the referenced gems. Here is an example `Gemfile` with two referenced gems, "jekyll" and "html-proofer":
 
 ```ruby
 source "https://rubygems.org"
@@ -90,7 +90,7 @@ Your `.travis.yml` file should look like this:
 ```yaml
 language: ruby
 rvm:
-- 2.3.3
+  - 2.6.3
 
 before_script:
  - chmod +x ./script/cibuild # or do this locally and commit
@@ -105,11 +105,16 @@ branches:
   - gh-pages     # test the gh-pages branch
   - /pages-(.*)/ # test every branch which starts with "pages-"
 
-env:
-  global:
-  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
+addons:
+  apt:
+    packages:
+    - libcurl4-openssl-dev
 
-sudo: false # route your build to the container-based infrastructure for a faster build
+cache: bundler # caching bundler gem packages will speed up build
+
+# Optional: disable email notifications about the outcome of your builds
+notifications:
+  email: false
 ```
 
 Ok, now for an explanation of each line:
@@ -123,12 +128,13 @@ access to Bundler, RubyGems, and a Ruby runtime.
 
 ```yaml
 rvm:
-- 2.3.3
+  - 2.6.3
 ```
 
 RVM is a popular Ruby Version Manager (like rbenv, chruby, etc). This
 directive tells Travis the Ruby version to use when running your test
-script.
+script. Use a [version which is pre-installed on the Travis build docker][5]
+image to speed up the build.
 
 ```yaml
 before_script:
@@ -177,18 +183,6 @@ prefixed, exemplified above with the `/pages-(.*)/` regular expression.
 The `branches` directive is completely optional. Travis will build from every
 push to any branch of your repo if leave it out.
 
-```yaml
-env:
-  global:
-  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
-```
-
-Using `html-proofer`? You'll want this environment variable. Nokogiri, used
-to parse HTML files in your compiled site, comes bundled with libraries
-which it must compile each time it is installed. Luckily, you can
-dramatically decrease the install time of Nokogiri by setting the
-environment variable `NOKOGIRI_USE_SYSTEM_LIBRARIES` to `true`.
-
 <div class="note warning">
   <h5>Be sure to exclude <code>vendor</code> from your
    <code>_config.yml</code></h5>
@@ -200,14 +194,21 @@ environment variable `NOKOGIRI_USE_SYSTEM_LIBRARIES` to `true`.
 exclude: [vendor]
 ```
 
-By default you should supply the `sudo: false` command to Travis. This command
-explicitly tells Travis to run your build on Travis's [container-based
- infrastructure](https://docs.travis-ci.com/user/workers/container-based-infrastructure/#Routing-your-build-to-container-based-infrastructure). Running on the container-based infrastructure can often times
-speed up your build. If you have any trouble with your build, or if your build
-does need `sudo` access, modify the line to `sudo: required`.
+To speed up the build, you should cache the gem packages created by `bundler`.
+Travis has a pre-defined [cache strategy for this tool][6] which should have
+all the default configs to do exactly that.
 
 ```yaml
-sudo: false
+cache: bundler
+```
+
+Optionally, if you are not interested in the build email notifications you
+can disable them with this configuration. Travis supports a wide array of
+notification services, you may find [another one more useful (e.g. slack)][7].
+
+```yaml
+notifications:
+  email: false
 ```
 
 ### Troubleshooting
@@ -227,3 +228,6 @@ fix or [ask for help][4] if you run into trouble and need some help.
 
 [3]: https://github.com/jekyll/jekyll/edit/master/docs/_docs/continuous-integration/travis-ci.md
 [4]: https://jekyllrb.com/help/
+[5]: https://docs.travis-ci.com/user/languages/ruby/#Specifying-Ruby-versions-and-implementations
+[6]: https://docs.travis-ci.com/user/caching/#Caching-directories-(Bundler%2C-dependencies)
+[7]: https://docs.travis-ci.com/user/notifications/

docs/_docs/contributing.md

@@ -8,30 +8,30 @@ Hi there! Interested in contributing to Jekyll? We'd love your help. Jekyll is a
 
 ## Where to get help or report a problem
 
-See [the support guidelines](https://jekyllrb.com/docs/support/)
+See the [support guidelines](https://jekyllrb.com/docs/support/)
 
 ## Ways to contribute
 
 Whether you're a developer, a designer, or just a Jekyll devotee, there are lots of ways to contribute. Here's a few ideas:
 
-* [Install Jekyll on your computer](https://jekyllrb.com/docs/installation/) and kick the tires. Does it work? Does it do what you'd expect? If not, [open an issue](https://github.com/jekyll/jekyll/issues/new) and let us know.
-* Comment on some of the project's [open issues](https://github.com/jekyll/jekyll/issues). Have you experienced the same problem? Know a work around? Do you have a suggestion for how the feature could be better?
-* Read through [the documentation](https://jekyllrb.com/docs/home/), and click the "improve this page" button, any time you see something confusing, or have a suggestion for something that could be improved.
-* Browse through [the Jekyll discussion forum](https://talk.jekyllrb.com/), and lend a hand answering questions. There's a good chance you've already experienced what another user is experiencing.
-* Find [an open issue](https://github.com/jekyll/jekyll/issues) (especially [those labeled `help-wanted`](https://github.com/jekyll/jekyll/issues?q=is%3Aopen+is%3Aissue+label%3Ahelp-wanted)), and submit a proposed fix. If it's your first pull request, we promise we won't bite, and are glad to answer any questions.
-* Help evaluate [open pull requests](https://github.com/jekyll/jekyll/pulls), by testing the changes locally and reviewing what's proposed.
+- [Install Jekyll on your computer](https://jekyllrb.com/docs/installation/) and kick the tires. Does it work? Does it do what you'd expect? If not, [open an issue](https://github.com/jekyll/jekyll/issues/new) and let us know.
+- Comment on some of the project's [open issues](https://github.com/jekyll/jekyll/issues). Have you experienced the same problem? Know a work around? Do you have a suggestion for how the feature could be better?
+- Read through the [documentation](https://jekyllrb.com/docs/home/), and click the "improve this page" button, any time you see something confusing, or have a suggestion for something that could be improved.
+- Browse through the [Jekyll discussion forum](https://talk.jekyllrb.com/), and lend a hand answering questions. There's a good chance you've already experienced what another user is experiencing.
+- Find an [open issue](https://github.com/jekyll/jekyll/issues) (especially [those labeled `help-wanted`](https://github.com/jekyll/jekyll/issues?q=is%3Aopen+is%3Aissue+label%3Ahelp-wanted)), and submit a proposed fix. If it's your first pull request, we promise we won't bite, and are glad to answer any questions.
+- Help evaluate [open pull requests](https://github.com/jekyll/jekyll/pulls), by testing the changes locally and reviewing what's proposed.
 
 ## Submitting a pull request
 
 ### Pull requests generally
 
-* The smaller the proposed change, the better. If you'd like to propose two unrelated changes, submit two pull requests.
+- The smaller the proposed change, the better. If you'd like to propose two unrelated changes, submit two pull requests.
 
-* The more information, the better. Make judicious use of the pull request body. Describe what changes were made, why you made them, and what impact they will have for users.
+- The more information, the better. Make judicious use of the pull request body. Describe what changes were made, why you made them, and what impact they will have for users.
 
-* Pull requests are easy and fun. If this is your first pull request, it may help to [understand GitHub Flow](https://guides.github.com/introduction/flow/).
+- If this is your first pull request, it may help to [understand GitHub Flow](https://guides.github.com/introduction/flow/).
 
-* If you're submitting a code contribution, be sure to read the [code contributions](#code-contributions) section below.
+- If you're submitting a code contribution, be sure to read the [code contributions](#code-contributions) section below.
 
 ### Submitting a pull request via github.com
 
@@ -53,7 +53,7 @@ That's it! You'll be automatically subscribed to receive updates as others revie
 2. Clone the repository locally `git clone https://github.com/<you-username>/jekyll`.
 3. Create a new, descriptively named branch to contain your change ( `git checkout -b my-awesome-feature` ).
 4. Hack away, add tests. Not necessarily in that order.
-5. Make sure everything still passes by running `script/cibuild` (see [the tests section](#running-tests-locally) below)
+5. Make sure everything still passes by running `script/cibuild` (see the [tests section](#running-tests-locally) below)
 6. Push the branch up ( `git push origin my-awesome-feature` ).
 7. Create a pull request by visiting `https://github.com/<your-username>/jekyll` and following the instructions at the top of the screen.
 
@@ -80,11 +80,12 @@ If you ever need to update our documentation with an icon that is not already av
 5. Click `Generate Font` on the bottom-horizontal-bar.
 6. Inspect the included icons and proceed by clicking `Download`.
 7. Extract the font files and adapt the CSS to the paths we use in Jekyll:
-  - Copy the entire `fonts` directory over and overwrite existing ones at `<jekyll>/docs/`.
-  - Copy the contents of `selection.json` and overwrite existing content inside `<jekyll>/docs/icomoon-selection.json`.
-  - Copy the entire `@font-face {}` declaration and only the **new-icon(s)' css declarations** further below, to update the
+
+- Copy the entire `fonts` directory over and overwrite existing ones at `<jekyll>/docs/`.
+- Copy the contents of `selection.json` and overwrite existing content inside `<jekyll>/docs/icomoon-selection.json`.
+- Copy the entire `@font-face {}` declaration and only the **new-icon(s)' css declarations** further below, to update the
   `<jekyll>/docs/_sass/_font-awesome.scss` sass partial.
-  - Fix paths in the `@font-face {}` declaration by adding `../` before `fonts/FontAwesome.*` like so:
+- Fix paths in the `@font-face {}` declaration by adding `../` before `fonts/FontAwesome.*` like so:
   `('../fonts/Fontawesome.woff?9h6hxj')`.
 
 ### Adding plugins
@@ -93,7 +94,7 @@ If you want to add your plugin to the [list of plugins](https://jekyllrb.com/doc
 
 ## Code Contributions
 
-Interesting in submitting a pull request? Awesome. Read on. There's a few common gotchas that we'd love to help you avoid.
+Interested in submitting a pull request? Awesome. Read on. There's a few common gotchas that we'd love to help you avoid.
 
 ### Tests and documentation
 
@@ -105,19 +106,21 @@ If your contribution changes any Jekyll behavior, make sure to update the docume
 
 #### Tests
 
-* If you're creating a small fix or patch to an existing feature, a simple test is more than enough. You can usually copy/paste from an existing example in the `tests` folder, but if you need you can find out about our tests suites [Shoulda](https://github.com/thoughtbot/shoulda/tree/master) and [RSpec-Mocks](https://github.com/rspec/rspec-mocks).
+- If you're creating a small fix or patch to an existing feature, a simple test is more than enough. You can usually copy/paste from an existing example in the `tests` folder, but if you need you can find out about our tests suites [Shoulda](https://github.com/thoughtbot/shoulda/tree/master) and [RSpec-Mocks](https://github.com/rspec/rspec-mocks).
 
-* If it's a brand new feature, create a new [Cucumber](https://github.com/cucumber/cucumber/) feature, reusing existing steps where appropriate.
+- If it's a brand new feature, create a new [Cucumber](https://github.com/cucumber/cucumber/) feature, reusing existing steps where appropriate.
 
 ### Code contributions generally
 
-* Jekyll uses the [Rubocop](https://github.com/bbatsov/rubocop) static analyzer to ensure that contributions follow the [GitHub Ruby Styleguide](https://github.com/styleguide/ruby). Please check your code using `script/fmt` and resolve any errors before pushing your branch.
+- Jekyll uses the [Rubocop](https://github.com/bbatsov/rubocop) static analyzer to ensure that contributions follow the [GitHub Ruby Styleguide](https://github.com/styleguide/ruby). Please check your code using `script/fmt` and resolve any errors before pushing your branch.
 
-* Don't bump the Gem version in your pull request (if you don't know what that means, you probably didn't).
+- Don't bump the Gem version in your pull request (if you don't know what that means, you probably didn't).
 
-* You can use the command `script/console` to start a REPL to explore the result of
-Jekyll's methods. It also provides you with helpful methods to quickly create a
-site or configuration. [Feel free to check it out!](https://github.com/jekyll/jekyll/blob/master/script/console)
+- You can use the command `script/console` to start a REPL to explore the result of
+  Jekyll's methods. It also provides you with helpful methods to quickly create a
+  site or configuration. [Feel free to check it out!](https://github.com/jekyll/jekyll/blob/master/script/console)
+
+- Previously, we've used the WIP Probot app to help contributors determine whether their pull request is ready for review. Please use a [draft pull request](https://help.github.com/en/articles/about-pull-requests#draft-pull-requests) instead. When you're ready, [mark the pull request as ready for review](https://help.github.com/en/articles/changing-the-stage-of-a-pull-request)
 
 ## Running tests locally
 
@@ -150,6 +153,10 @@ script/cucumber features/blah.feature
 Both `script/test` and `script/cucumber` can be run without arguments to
 run its entire respective suite.
 
+## Visual Studio Code Development Container
+
+If you've got [Visual Studio Code](https://code.visualstudio.com/) with the [Remote Development Extension Pack](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.vscode-remote-extensionpack) installed then simply opening this repository in Visual Studio Code and following the prompts to "Re-open In A Development Container" will get you setup and ready to go with a fresh environment with all the requirements installed.
+
 ## A thank you
 
 Thanks! Hacking on Jekyll should be fun. If you find any of this hard to figure out, let us know so we can improve our process or documentation!

docs/_docs/datafiles.md

@@ -3,13 +3,12 @@ title: Data Files
 permalink: /docs/datafiles/
 ---
 
-In addition to the [built-in variables](../variables/) available from Jekyll,
+In addition to the [built-in variables]({{'/docs/variables/' | relative_url }}) available from Jekyll,
 you can specify your own custom data that can be accessed via the [Liquid
-templating system](https://wiki.github.com/shopify/liquid/liquid-for-designers).
+templating system](https://github.com/Shopify/liquid/wiki/Liquid-for-Designers).
 
-Jekyll supports loading data from [YAML](http://yaml.org/), [JSON](http://www.json.org/),
-and [CSV](https://en.wikipedia.org/wiki/Comma-separated_values) files located in the `_data` directory.
-Note that CSV files *must* contain a header row.
+Jekyll supports loading data from [YAML](http://yaml.org/), [JSON](http://www.json.org/), [CSV](https://en.wikipedia.org/wiki/Comma-separated_values), and [TSV](https://en.wikipedia.org/wiki/Tab-separated_values) files located in the `_data` directory.
+Note that CSV and TSV files *must* contain a header row.
 
 This powerful feature allows you to avoid repetition in your templates and to
 set site specific options without changing `_config.yml`.
@@ -18,9 +17,8 @@ Plugins/themes can also leverage Data Files to set configuration variables.
 
 ## The Data Folder
 
-As explained on the [directory structure](../structure/) page, the `_data`
-folder is where you can store additional data for Jekyll to use when generating
-your site. These files must be YAML, JSON, or CSV files (using either
+The `_data` folder is where you can store additional data for Jekyll to use when
+generating your site. These files must be YAML, JSON, or CSV files (using either
 the `.yml`, `.yaml`, `.json` or `.csv` extension), and they will be
 accessible via `site.data`.
 
@@ -44,15 +42,15 @@ In `_data/members.yml`:
 
 Or `_data/members.csv`:
 
-```text
+```
 name,github
 Eric Mill,konklone
 Parker Moore,parkr
 Liu Fengyun,liufengyun
 ```
 
-This data can be accessed via `site.data.members` (notice that the filename
-determines the variable name).
+This data can be accessed via `site.data.members` (notice that the file's *basename* determines the variable name and
+therefore one should avoid having data files with the same basename but different extensions, in the same directory).
 
 You can now render the list of members in a template:
 
@@ -70,10 +68,7 @@ You can now render the list of members in a template:
 ```
 {% endraw %}
 
-{: .note .info }
-If your Jekyll site has a lot of pages, such as with documentation websites, see the detailed examples in [how to build robust navigation for your site]({% link _tutorials/navigation.md %}).
-
-## Example: Organizations
+## Subfolders
 
 Data files can also be placed in sub-folders of the `_data` folder. Each folder
 level will be added to a variable's namespace. The example below shows how
@@ -134,7 +129,7 @@ dave:
     twitter: DavidSilvaSmith
 ```
 
-The author can then be specified as a page variable in a post's frontmatter:
+The author can then be specified as a page variable in a post's front matter:
 
 {% raw %}
 ```liquid
@@ -152,4 +147,4 @@ author: dave
 ```
 {% endraw %}
 
-For information on how to build robust navigation for your site (especially if you have a documentation website or another type of Jekyll site with a lot of pages to organize), see [Navigation](/tutorials/navigation).
+For information on how to build robust navigation for your site (especially if you have a documentation website or another type of Jekyll site with a lot of pages to organize), see [Navigation]({{ '/tutorials/navigation/' | relative_url }}).

docs/_docs/deployment-methods.md

@@ -1,216 +0,0 @@
----
-title: Deployment methods
-permalink: /docs/deployment-methods/
----
-
-Sites built using Jekyll can be deployed in a large number of ways due to the static nature of the generated output. A few of the most common deployment techniques are described below.
-
-<div class="note">
-  <h5>ProTip™: Use GitHub Pages for zero-hassle Jekyll hosting</h5>
-  <p>GitHub Pages are powered by Jekyll behind the scenes, so if you’re looking for a zero-hassle, zero-cost solution, GitHub Pages are a great way to <a href="../github-pages/">host your Jekyll-powered website for free</a>.</p>
-</div>
-
-## Netlify
-
-Netlify provides Global CDN, Continuous Deployment, one click HTTPS and [much more](https://www.netlify.com/features/), providing developers the most robust toolset available for modern web projects, without added complexity. Netlify supports custom plugins for Jekyll and has a free plan for open source projects.
-
-Read this [Jekyll step-by-step guide](https://www.netlify.com/blog/2015/10/28/a-step-by-step-guide-jekyll-3.0-on-netlify/) to setup your Jekyll site on Netlify.
-
-## Aerobatic
-
-[Aerobatic](https://www.aerobatic.com) has custom domains, global CDN distribution, basic auth, CORS proxying, and a growing list of plugins all included.
-
-Automating the deployment of a Jekyll site is simple. See their [Jekyll docs](https://www.aerobatic.com/docs/static-site-generators/#jekyll) for more details. Your built `_site` folder is deployed to their highly-available, globally distributed hosting service.
-
-## Kickster
-
-Use [Kickster](http://kickster.nielsenramon.com/) for easy (automated) deploys to GitHub Pages when using unsupported plugins on GitHub Pages.
-
-Kickster provides a basic Jekyll project setup packed with web best practises and useful optimization tools increasing your overall project quality. Kickster ships with automated and worry-free deployment scripts for GitHub Pages.
-
-Setting up Kickster is very easy, just install the gem and you are good to go. More documentation can here found [here](https://github.com/nielsenramon/kickster#kickster). If you do not want to use the gem or start a new project you can just copy paste the deployment scripts for [Travis CI](https://github.com/nielsenramon/kickster/tree/master/snippets/travis) or [Circle CI](https://github.com/nielsenramon/kickster#automated-deployment-with-circle-ci).
-
-## Web hosting providers (FTP)
-
-Just about any traditional web hosting provider will let you upload files to their servers over FTP. To upload a Jekyll site to a web host using FTP, simply run the `jekyll build` command and copy the contents of the generated `_site` folder to the root folder of your hosting account. This is most likely to be the `httpdocs` or `public_html` folder on most hosting providers.
-
-## Self-managed web server
-
-If you have direct access to the deployment web server, the process is essentially the same, except you might have other methods available to you (such as `scp`, or even direct filesystem access) for transferring the files. Just remember to make sure the contents of the generated `_site` folder get placed in the appropriate web root directory for your web server.
-
-## Automated methods
-
-There are also a number of ways to easily automate the deployment of a Jekyll site. If you’ve got another method that isn’t listed below, we’d love it if you [contributed](../contributing/) so that everyone else can benefit too.
-
-### Git post-update hook
-
-If you store your Jekyll site in [Git](https://git-scm.com/) (you are using
-version control, right?), it’s pretty easy to automate the
-deployment process by setting up a post-update hook in your Git
-repository, [like
-this](http://web.archive.org/web/20091223025644/http://www.taknado.com/en/2009/03/26/deploying-a-jekyll-generated-site/).
-
-### Git post-receive hook
-
-To have a remote server handle the deploy for you every time you push changes using Git, you can create a user account which has all the public keys that are authorized to deploy in its `authorized_keys` file. With that in place, setting up the post-receive hook is done as follows:
-
-```sh
-laptop$ ssh deployer@example.com
-server$ mkdir myrepo.git
-server$ cd myrepo.git
-server$ git --bare init
-server$ cp hooks/post-receive.sample hooks/post-receive
-server$ mkdir /var/www/myrepo
-```
-
-Next, add the following lines to hooks/post-receive and be sure Jekyll is
-installed on the server:
-
-```bash
-GIT_REPO=$HOME/myrepo.git
-TMP_GIT_CLONE=$HOME/tmp/myrepo
-GEMFILE=$TMP_GIT_CLONE/Gemfile
-PUBLIC_WWW=/var/www/myrepo
-
-git clone $GIT_REPO $TMP_GIT_CLONE
-BUNDLE_GEMFILE=$GEMFILE bundle install
-BUNDLE_GEMFILE=$GEMFILE bundle exec jekyll build -s $TMP_GIT_CLONE -d $PUBLIC_WWW
-rm -Rf $TMP_GIT_CLONE
-exit
-```
-
-Finally, run the following command on any users laptop that needs to be able to
-deploy using this hook:
-
-```sh
-laptops$ git remote add deploy deployer@example.com:~/myrepo.git
-```
-
-Deploying is now as easy as telling nginx or Apache to look at
-`/var/www/myrepo` and running the following:
-
-```sh
-laptops$ git push deploy master
-```
-
-### Static Publisher
-
-[Static Publisher](https://github.com/static-publisher/static-publisher) is another automated deployment option with a server listening for webhook posts, though it's not tied to GitHub specifically. It has a one-click deploy to Heroku, it can watch multiple projects from one server, it has an easy to user admin interface and can publish to either S3 or to a git repository (e.g. gh-pages).
-
-### Rake
-
-Another way to deploy your Jekyll site is to use [Rake](https://github.com/ruby/rake), [HighLine](https://github.com/JEG2/highline), and
-[Net::SSH](https://github.com/net-ssh/net-ssh). A more complex example of deploying Jekyll with Rake that deals with multiple branches can be found in [Git Ready](https://github.com/gitready/gitready/blob/cdfbc4ec5321ff8d18c3ce936e9c749dbbc4f190/Rakefile).
-
-
-### scp
-
-Once you’ve generated the `_site` directory, you can easily scp its content using a
-`tasks/deploy` shell script similar to [this deploy script][]. You’d obviously
-need to change the values to reflect your site’s details. There is even [a
-matching TextMate command][] that will help you run this script.
-
-[this deploy script]: https://github.com/henrik/henrik.nyh.se/blob/master/script/deploy
-
-[a matching TextMate command]: https://gist.github.com/henrik/214959
-
-### rsync
-
-Once you’ve generated the `_site` directory, you can easily rsync its content using a `tasks/deploy` shell script similar to [this deploy script here](https://github.com/vitalyrepin/vrepinblog/blob/master/transfer.sh). You’d obviously need to change the values to reflect your site’s details.
-
-Certificate-based authorization is another way to simplify the publishing
-process. It makes sense to restrict rsync access only to the directory which it is supposed to sync. This can be done using rrsync.
-
-#### Step 1: Install rrsync to your home folder (server-side)
-
-If it is not already installed by your host, you can do it yourself:
-
-- [Download rrsync](https://ftp.samba.org/pub/unpacked/rsync/support/rrsync)
-- Place it in the `bin` subdirectory of your home folder  (`~/bin`)
-- Make it executable (`chmod +x`)
-
-#### Step 2: Set up certificate-based SSH access (server side)
-
-This [process](https://wiki.gentoo.org/wiki/SSH#Passwordless_Authentication) is
-described in several places online. What is different from the typical approach
-is to put the restriction to certificate-based authorization in
-`~/.ssh/authorized_keys`. Then, launch `rrsync` and supply
-it with the folder it shall have read-write access to:
-
-```sh
-command="$HOME/bin/rrsync <folder>",no-agent-forwarding,no-port-forwarding,no-pty,no-user-rc,no-X11-forwarding ssh-rsa <cert>
-```
-
-`<folder>` is the path to your site. E.g., `~/public_html/you.org/blog-html/`.
-
-#### Step 3: Rsync (client-side)
-
-Add the `deploy` script to the site source folder:
-
-```sh
-#!/bin/sh
-
-rsync -crvz --rsh='ssh -p2222' --delete-after --delete-excluded   <folder> <user>@<site>:
-```
-
-Command line parameters are:
-
-- `--rsh=ssh -p2222` &mdash; The port for SSH access. It is required if
-your host uses a different port than the default (e.g, HostGator)
-- `<folder>` &mdash; The name of the local output folder (defaults to `_site`)
-- `<user>` &mdash; The username for your hosting account
-- `<site>` &mdash; Your hosting server
-
-Using this setup, you might run the following command:
-
-```sh
-rsync -crvz --rsh='ssh -p2222' --delete-after --delete-excluded _site/ hostuser@example.org:
-```
-
-Don't forget the column `:` after server name!
-
-#### Step 4 (Optional): Exclude the transfer script from being copied to the output folder.
-
-This step is recommended if you use these instructions to deploy your site. If
-you put the `deploy` script in the root folder of your project, Jekyll will
-copy it to the output folder. This behavior can be changed in `_config.yml`.
-
-Just add the following line:
-
-```yaml
-# Do not copy these files to the output directory
-exclude: ["deploy"]
-```
-
-Alternatively, you can use an `rsync-exclude.txt` file to control which files will be transferred to your server.
-
-#### Done!
-
-Now it's possible to publish your website simply by running the `deploy`
-script. If your SSH certificate  is [passphrase-protected](https://martin.kleppmann.com/2013/05/24/improving-security-of-ssh-private-keys.html), you will be asked to enter it when the
-script executes.
-
-## Rack-Jekyll
-
-[Rack-Jekyll](https://github.com/adaoraul/rack-jekyll/) is an easy way to deploy your site on any Rack server such as Amazon EC2, Slicehost, Heroku, and so forth. It also can run with [shotgun](https://github.com/rtomayko/shotgun/), [rackup](https://github.com/rack/rack), [mongrel](https://github.com/mongrel/mongrel), [unicorn](https://github.com/defunkt/unicorn/), and [others](https://github.com/adaoraul/rack-jekyll#readme).
-
-Read [this post](http://andycroll.com/ruby/serving-a-jekyll-blog-using-heroku/) on how to deploy to Heroku using Rack-Jekyll.
-
-## Jekyll-Admin for Rails
-
-If you want to maintain Jekyll inside your existing Rails app, [Jekyll-Admin](https://github.com/zkarpinski/Jekyll-Admin) contains drop in code to make this possible. See Jekyll-Admin’s [README](https://github.com/zkarpinski/Jekyll-Admin/blob/master/README) for more details.
-
-## Amazon S3
-
-If you want to host your site in Amazon S3, you can do so by
-using the [s3_website](https://github.com/laurilehmijoki/s3_website)
-application. It will push your site to Amazon S3 where it can be served like
-any web server,
-dynamically scaling to almost unlimited traffic. This approach has the
-benefit of being about the cheapest hosting option available for
-low-volume blogs as you only pay for what you use.
-
-## OpenShift
-
-If you'd like to deploy your site to an OpenShift gear, there's [a cartridge
-for that](https://github.com/openshift-quickstart/jekyll-openshift).

docs/_docs/deployment.md

@@ -0,0 +1,11 @@
+---
+title: Deployment
+permalink: /docs/deployment/
+redirect_from: "/docs/deployment-methods/index.html"
+---
+
+Sites built using Jekyll can be deployed in a large number of ways due to the static nature of the generated output. Here's some of the most common ways:
+
+* [Manually]({{ '/docs/deployment/manual/' | relative_url }})
+* [Automated]({{ '/docs/deployment/automated/' | relative_url }})
+* [Third Party]({{ '/docs/deployment/third-party/' | relative_url }})

docs/_docs/deployment/automated.md

@@ -0,0 +1,69 @@
+---
+title: Automated Deployment
+permalink: /docs/deployment/automated/
+---
+There are a number of ways to easily automate the deployment of a Jekyll site.
+
+## Continuous Integration Service
+
+One of the easiest ways to set up an automated deployment flow is by using a
+CI.
+
+These services run a script when there's a commit on your Git repository.
+You might want this script to build the site, run tests over the output then deploy it to the
+service of your choice.
+
+We have guides for the following providers:
+
+* [GitHub Actions]({{ '/docs/continuous-integration/github-actions/' | relative_url }})
+* [Travis CI]({{ '/docs/continuous-integration/travis-ci/' | relative_url }})
+* [CircleCI]({{ '/docs/continuous-integration/circleci/' | relative_url }})
+* [Buddy]({{ '/docs/continuous-integration/buddyworks/' | relative_url }})
+
+## Git post-receive hook
+
+To have a remote server handle the deploy for you every time you push changes using Git, you can create a user account which has all the public keys that are authorized to deploy in its `authorized_keys` file. With that in place, setting up the post-receive hook is done as follows:
+
+```sh
+laptop$ ssh deployer@example.com
+server$ mkdir myrepo.git
+server$ cd myrepo.git
+server$ git --bare init
+server$ cp hooks/post-receive.sample hooks/post-receive
+server$ mkdir /var/www/myrepo
+```
+
+Next, add the following lines to hooks/post-receive and be sure Jekyll is
+installed on the server:
+
+```bash
+#!/bin/bash -l
+
+# Install Ruby Gems to ~/gems
+export GEM_HOME=$HOME/gems
+export PATH=$GEM_HOME/bin:$PATH
+
+TMP_GIT_CLONE=$HOME/tmp/myrepo
+GEMFILE=$TMP_GIT_CLONE/Gemfile
+PUBLIC_WWW=/var/www/myrepo
+
+git clone $GIT_DIR $TMP_GIT_CLONE
+BUNDLE_GEMFILE=$GEMFILE bundle install
+BUNDLE_GEMFILE=$GEMFILE bundle exec jekyll build -s $TMP_GIT_CLONE -d $PUBLIC_WWW
+rm -Rf $TMP_GIT_CLONE
+exit
+```
+
+Finally, run the following command on any users laptop that needs to be able to
+deploy using this hook:
+
+```sh
+laptops$ git remote add deploy deployer@example.com:~/myrepo.git
+```
+
+Deploying is now as easy as telling nginx or Apache to look at
+`/var/www/myrepo` and running the following:
+
+```sh
+laptops$ git push deploy master
+```

docs/_docs/deployment/manual.md

@@ -0,0 +1,36 @@
+---
+title: Manual Deployment
+permalink: /docs/deployment/manual/
+---
+
+Jekyll generates your static site to the `_site` directory by default. You can
+transfer the contents of this directory to almost any hosting provider to get
+your site live. Here are some manual ways of achieving this:
+
+## rsync
+
+Rsync is similar to scp except it can be faster as it will only send changed
+parts of files as opposed to the entire file. You can learn more about using
+rsync in the [Digital Ocean tutorial](https://www.digitalocean.com/community/tutorials/how-to-use-rsync-to-sync-local-and-remote-directories-on-a-vps).
+
+## Amazon S3
+
+If you want to host your site in Amazon S3, you can do so by
+using the [s3_website](https://github.com/laurilehmijoki/s3_website)
+application. It will push your site to Amazon S3 where it can be served like
+any web server,
+dynamically scaling to almost unlimited traffic. This approach has the
+benefit of being about the cheapest hosting option available for
+low-volume blogs as you only pay for what you use.
+
+## FTP
+
+Most traditional web hosting provider let you upload files to their servers over FTP. To upload a Jekyll site to a web host using FTP, run the `jekyll build` command and copy the contents of the generated `_site` folder to the root folder of your hosting account. This is most likely to be the `httpdocs` or `public_html` folder on most hosting providers.
+
+## scp
+
+If you have direct access to the deployment web server, the process is essentially the same, except you might have other methods available to you (such as `scp`, or even direct filesystem access) for transferring the files. Remember to make sure the contents of the generated `_site` folder get placed in the appropriate web root directory for your web server.
+
+## Rack-Jekyll
+
+[Rack-Jekyll](https://github.com/adaoraul/rack-jekyll/) allows you to deploy your site on any Rack server such as Amazon EC2, Slicehost, Heroku, and so forth. It also can run with [shotgun](https://github.com/rtomayko/shotgun/), [rackup](https://github.com/rack/rack), [mongrel](https://github.com/mongrel/mongrel), [unicorn](https://github.com/defunkt/unicorn/), and [others](https://github.com/adaoraul/rack-jekyll#readme).

docs/_docs/deployment/third-party.md

@@ -0,0 +1,72 @@
+---
+title: 3rd Party
+permalink: /docs/deployment/third-party/
+---
+
+
+## Aerobatic
+
+[Aerobatic](https://www.aerobatic.com) has custom domains, global CDN distribution, basic auth, CORS proxying, and a growing list of plugins all included.
+
+Automating the deployment of a Jekyll site is simple. See their [Jekyll docs](https://www.aerobatic.com/docs/static-site-generators/#jekyll) for more details. Your built `_site` folder is deployed to their highly-available, globally distributed hosting service.
+
+## AWS Amplify
+
+The [AWS Amplify Console](https://console.amplify.aws) provides continuous deployment and hosting for modern web apps (single page apps and static site generators). Continuous deployment allows developers to deploy updates to their web app on every code commit to their Git repository. Hosting includes features such as globally available CDNs, 1-click custom domain setup + HTTPS, feature branch deployments, redirects, trailing slashes, and password protection.
+
+Read this [step-by-step guide](https://medium.com/@jameshamann/deploy-your-jekyll-site-using-aws-amplify-with-only-a-few-clicks-8f3dd8f26112) to deploy and host your Jekyll site on AWS Amplify.
+
+## Bip
+
+[Bip](https://bip.sh) provides zero downtime deployment, a global CDN, SSL, unlimited bandwidth and more for Jekyll websites. Deploy in seconds from the command line. [Visit the Bip website](https://bip.sh) for more information - which is also built with Jekyll.
+
+## CloudCannon
+
+[CloudCannon](https://cloudcannon.com) has everything you need to build, host
+and update Jekyll websites. Take advantage of our global CDN, automated SSL,
+continuous deployment and [more](https://cloudcannon.com/features/).
+
+## GitHub Pages
+
+Sites on GitHub Pages are powered by Jekyll behind the scenes, so if you’re looking for a zero-hassle, zero-cost solution, GitHub Pages are a great way to [host your Jekyll-powered website for free](/docs/github-pages/).
+
+## GitLab Pages
+
+[GitLab Pages](https://about.gitlab.com/stages-devops-lifecycle/pages/) offers free hosting with custom domains. [Get started with Jekyll](https://docs.gitlab.com/ee/user/project/pages/getting_started_part_four.html#practical-example) and a fully customizable pipeline.
+
+## KeyCDN
+
+[KeyCDN](https://www.keycdn.com) accelerates Jekyll-powered websites with a wide range of other features such as real time image processing including WebP transformation.  
+The [Jekyll hosting tutorial](https://www.keycdn.com/support/jekyll-hosting) provides various options to supercharge Jekyll sites with just a few steps. It combines best flexibility and excellent performance.
+
+## Kickster
+
+Use [Kickster](http://kickster.nielsenramon.com/) for automated deploys to GitHub Pages when using unsupported plugins on GitHub Pages.
+
+Kickster provides a basic Jekyll project setup packed with web best practises and useful optimization tools increasing your overall project quality. Kickster ships with automated and worry-free deployment scripts for GitHub Pages.
+
+Install the Kickster gem and you are good to go. More documentation can here found [here](https://github.com/nielsenramon/kickster#kickster). If you do not want to use the gem or start a new project you can just copy paste the deployment scripts for [Travis CI](https://github.com/nielsenramon/kickster/tree/master/snippets/travis) or [Circle CI](https://github.com/nielsenramon/kickster#automated-deployment-with-circle-ci).
+
+## Netlify
+
+Netlify provides Global CDN, Continuous Deployment, one click HTTPS and [much more](https://www.netlify.com/features/), providing developers a robust toolset for modern web projects, without added complexity. Netlify supports custom plugins for Jekyll and has a free plan for open source projects.
+
+Read this [Jekyll step-by-step guide](https://www.netlify.com/blog/2020/04/02/a-step-by-step-guide-jekyll-4.0-on-netlify/) to setup your Jekyll site on Netlify.
+
+## Render
+
+[Render](https://render.com) provides zero config continuous deployment for static sites. The service is free under 100GB monthly bandwith.
+
+## Static Publisher
+
+[Static Publisher](https://github.com/static-publisher/static-publisher) is another automated deployment option with a server listening for webhook posts, though it's not tied to GitHub specifically. It has a one-click deploy to Heroku, it can watch multiple projects from one server, it has an easy to user admin interface and can publish to either S3 or to a git repository (e.g. gh-pages).
+
+## Vercel
+
+[Vercel](https://vercel.com/) provides zero config continuous deployment, HTTPS Custom domains, high performance smart CDN, you get instant static deploy for free.
+
+## 21YunBox
+
+[21YunBox](https://www.21yunbox.com) provides blazing fast Chinese CDN, Continuous Deployment, one click HTTPS and [much more](https://www.21yunbox.com/docs/), providing developers a hassle-free solution to launch their web projects in China.
+
+Read this [Jekyll step-by-step guide](https://www.21yunbox.com/docs/#/deploy-jekyll) to deploy your Jekyll site on 21YunBox.

docs/_docs/drafts.md

@@ -1,19 +0,0 @@
----
-title: Working with drafts
-permalink: /docs/drafts/
----
-
-Drafts are posts without a date. They're posts you're still working on and
-don't want to publish yet. To get up and running with drafts, create a
-`_drafts` folder in your site's root (as described in the [site structure](/docs/structure/) section) and create your
-first draft:
-
-```text
-|-- _drafts/
-|   |-- a-draft-post.md
-```
-
-To preview your site with drafts, simply run `jekyll serve` or `jekyll build`
-with the `--drafts` switch. Each will be assigned the value modification time
-of the draft file for its date, and thus you will see currently edited drafts
-as the latest posts.

docs/_docs/extras.md

@@ -1,31 +0,0 @@
----
-title: Extras
-permalink: /docs/extras/
----
-
-There are a number of (optional) extra features that Jekyll supports that you
-may want to install, depending on how you plan to use Jekyll.
-
-## Web Highlights and Commenting 
-
-Register your site with [txtpen](https://txtpen.com). Then append 
-
-```html
-<script src="https://txtpen.com/embed.js?site=<your site name>"></script>
-```
-
-to your template files in `/_layout` folder.
-
-## Math Support
-
-Kramdown comes with optional support for LaTeX to PNG rendering via [MathJax](https://www.mathjax.org) within math blocks. See the Kramdown documentation on [math blocks](http://kramdown.gettalong.org/syntax.html#math-blocks) and [math support](http://kramdown.gettalong.org/converter/html.html#math-support) for more details. MathJax requires you to include JavaScript or CSS to render the LaTeX, e.g.
-
-```html
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script>
-```
-
-For more information about getting started, check out [this excellent blog post](http://gastonsanchez.com/visually-enforced/opinion/2014/02/16/Mathjax-with-jekyll/).
-
-## Alternative Markdown Processors
-
-See the Markdown section on the [configuration page](/docs/configuration/#markdown-options) for instructions on how to use and configure alternative Markdown processors, as well as how to create [custom processors](/docs/configuration/#custom-markdown-processors).

docs/_docs/front-matter.md

@@ -1,13 +1,13 @@
 ---
 title: Front Matter
-permalink: /docs/frontmatter/
+permalink: /docs/front-matter/
+redirect_from: /docs/frontmatter/index.html
 ---
 
-The front matter is where Jekyll starts to get really cool. Any file that
-contains a [YAML](http://yaml.org/) front matter block will be processed by
-Jekyll as a special file. The front matter must be the first thing in the file
-and must take the form of valid YAML set between triple-dashed lines. Here is a
-basic example:
+Any file that contains a [YAML](https://yaml.org/) front matter block will be
+processed by Jekyll as a special file. The front matter must be the first thing
+in the file and must take the form of valid YAML set between triple-dashed
+lines. Here is a basic example:
 
 ```yaml
 ---
@@ -18,7 +18,7 @@ title: Blogging Like a Hacker
 
 Between these triple-dashed lines, you can set predefined variables (see below
 for a reference) or even create custom ones of your own. These variables will
-then be available to you to access using Liquid tags both further down in the
+then be available for you to access using Liquid tags both further down in the
 file and also in any layouts or includes that the page or post in question
 relies on.
 
@@ -28,14 +28,14 @@ relies on.
     If you use UTF-8 encoding, make sure that no <code>BOM</code> header
     characters exist in your files or very, very bad things will happen to
     Jekyll. This is especially relevant if you’re running
-    <a href="../windows/">Jekyll on Windows</a>.
+    <a href="{{ '/docs/installation/windows/' | relative_url }}">Jekyll on Windows</a>.
   </p>
 </div>
 
 <div class="note">
-  <h5>ProTip™: Front Matter Variables Are Optional</h5>
+  <h5>Front Matter Variables Are Optional</h5>
   <p>
-    If you want to use <a href="../variables/">Liquid tags and variables</a>
+    If you want to use <a href="{{ '/docs/variables/' | relative_url }}">Liquid tags and variables</a>
     but don’t need anything in your front matter, just leave it empty! The set
     of triple-dashed lines with nothing in between will still get Jekyll to
     process your file. (This is useful for things like CSS and RSS feeds!)
@@ -71,14 +71,14 @@ front matter of a page or post.
         <ul>
           <li>
             Using <code>null</code> will produce a file without using a layout
-            file. However this is overridden if the file is a post/document and has a
-            layout defined in the <a href="../configuration/#front-matter-defaults">
-            frontmatter defaults</a>.
+            file. This is overridden if the file is a post/document and has a
+            layout defined in the <a href="{{ '/docs/configuration/front-matter-defaults/' | relative_url }}">
+            front matter defaults</a>.
           </li>
           <li>
             Starting from version 3.5.0, using <code>none</code> in a post/document will
-            produce a file without using a layout file regardless of frontmatter defaults.
-            Using <code>none</code> in a page, however, will cause Jekyll to attempt to
+            produce a file without using a layout file regardless of front matter defaults.
+            Using <code>none</code> in a page will cause Jekyll to attempt to
             use a layout named "none".
           </li>
         </ul>
@@ -114,30 +114,28 @@ front matter of a page or post.
 </div>
 
 <div class="note">
-  <h5>ProTip™: Render Posts Marked As Unpublished</h5>
+  <h5>Render Posts Marked As Unpublished</h5>
   <p>
-    To preview unpublished pages, simply run `jekyll serve` or `jekyll build`
-    with the `--unpublished` switch. Jekyll also has a handy <a href="../drafts/">drafts</a>
+    To preview unpublished pages, run `jekyll serve` or `jekyll build`
+    with the `--unpublished` switch. Jekyll also has a handy <a href="{{ '/docs/posts/#drafts' | relative_url }}">drafts</a>
     feature tailored specifically for blog posts.
   </p>
 </div>
 
 ## Custom Variables
 
-Any variables in the front matter that are not predefined are mixed into the
-data that is sent to the Liquid templating engine during the conversion. For
-instance, if you set a title, you can use that in your layout to set the page
-title:
+You can also set your own front matter variables you can access in Liquid. For
+instance, if you set a variable called `food`, you can use that in your page:
 
+{% raw %}
 ```liquid
-<!DOCTYPE HTML>
-<html>
-  <head>
-    <title>{% raw %}{{ page.title }}{% endraw %}</title>
-  </head>
-  <body>
-    …
+---
+food: Pizza
+---
+
+<h1>{{ page.food }}</h1>
 ```
+{% endraw %}
 
 ## Predefined Variables for Posts
 
@@ -203,10 +201,11 @@ These are available out-of-the-box to be used in the front matter for a post.
 </div>
 
 <div class="note">
-  <h5>ProTip™: Don't repeat yourself</h5>
+  <h5>Don't repeat yourself</h5>
   <p>
     If you don't want to repeat your frequently used front matter variables
-    over and over, just define <a href="../configuration/#front-matter-defaults" title="Front Matter defaults">defaults</a>
+    over and over, define
+    <a href="{{ '/docs/configuration/front-matter-defaults/' | relative_url }}" title="Front Matter defaults">defaults</a>
     for them and only override them where necessary (or not at all). This works
     both for predefined and custom variables.
   </p>

docs/_docs/github-pages.md

@@ -11,7 +11,7 @@ website for free.
 
 Your site is automatically generated by GitHub Pages when you push your source
 files. Note that GitHub Pages works equally well for regular HTML content,
-simply because Jekyll treats files without YAML front matter as static assets.
+simply because Jekyll treats files without front matter as static assets.
 So if you only need to push generated HTML, you're good to go without any
 further setup.
 
@@ -56,14 +56,14 @@ Be sure to run `bundle update` often.
 ### Project Page URL Structure
 
 Sometimes it's nice to preview your Jekyll site before you push your `gh-pages`
-branch to GitHub. However, the subdirectory-like URL structure GitHub uses for
+branch to GitHub. The subdirectory-like URL structure GitHub uses for
 Project Pages complicates the proper resolution of URLs. In order to assure your
-site builds properly, use the handy [URL filters](../templates/#filters):
+site builds properly, use the handy [URL filters]({{ '/docs/liquid/filters/' | relative_url }}):
 
 {% raw %}
 ```liquid
 <!-- For styles with static names... -->
-<link href="{{ "/assets/css/style.css" | relative_url }}" rel="stylesheet">
+<link href="{{ 'assets/css/style.css' | relative_url }}" rel="stylesheet">
 <!-- For documents/pages whose URLs can change... -->
 [{{ page.title }}]("{{ page.url | relative_url }}")
 ```
@@ -121,8 +121,8 @@ to see more detailed examples.
 <div class="note warning">
   <h5>Source files must be in the root directory</h5>
   <p>
-    GitHub Pages <a href="https://help.github.com/articles/troubleshooting-github-pages-build-failures#source-setting">overrides</a>
-    the <a href="/docs/configuration/#global-configuration">“Site Source”</a>
+    GitHub Pages <a href="https://help.github.com/en/github/working-with-github-pages/troubleshooting-jekyll-build-errors-for-github-pages-sites">overrides</a>
+    the <a href="{{ '/docs/configuration/options/' | relative_url }}">“Site Source”</a>
     configuration value, so if you locate your files anywhere other than the
     root directory, your site may not build correctly.
   </p>
@@ -135,6 +135,6 @@ to see more detailed examples.
     While Windows is not officially supported, it is possible
     to install the <code>github-pages</code> gem on Windows.
     Special instructions can be found on our
-    <a href="../windows/#installation">Windows-specific docs page</a>.
+    <a href="{{ '/docs/installation/windows/' | relative_url }}">Windows-specific docs page</a>.
   </p>
 </div>

docs/_docs/history.md

@@ -4,6 +4,704 @@ permalink: "/docs/history/"
 note: This file is autogenerated. Edit /History.markdown instead.
 ---
 
+## 4.2.0 / 2020-12-14
+{: #v4-2-0}
+
+### Minor Enhancements
+{: #minor-enhancements-v4-2-0}
+
+- Warn on command-line with permalink conflict ([#8342]({{ site.repository }}/issues/8342))
+- Supress warning issued for redirect pages ([#8347]({{ site.repository }}/issues/8347))
+- Enhance detection of conflicting destination URLs ([#8459]({{ site.repository }}/issues/8459))
+- Add `:post_convert` hook to modify HTML content before layout ([#8368]({{ site.repository }}/issues/8368))
+- Allow triggering `:post_convert` events atomically ([#8465]({{ site.repository }}/issues/8465))
+- Debug reading Page and Layout objects ([#8100]({{ site.repository }}/issues/8100))
+- Do not reset `site.url` to `http://localhost:4000` by default ([#7253]({{ site.repository }}/issues/7253))
+- Add custom debug strings for Jekyll objects ([#8473]({{ site.repository }}/issues/8473))
+- Debug reading data files in a site ([#8481]({{ site.repository }}/issues/8481))
+
+### Bug Fixes
+{: #bug-fixes-v4-2-0}
+
+- Replace nested conditional with guard clauses ([#8294]({{ site.repository }}/issues/8294))
+- Fix: security bump ([#8349]({{ site.repository }}/issues/8349))
+- Fix path matching regex in post_url Liquid tag ([#8375]({{ site.repository }}/issues/8375))
+- Enable `Performance/ChainArrayAllocation` cop ([#8404]({{ site.repository }}/issues/8404))
+- Enable Lint/NoReturnInBeginEndBlocks Cop ([#8457]({{ site.repository }}/issues/8457))
+- Generate items from `site.include` list only once ([#8463]({{ site.repository }}/issues/8463))
+- Explicitly return nil after site process phase ([#8472]({{ site.repository }}/issues/8472))
+
+### Optimization Fixes
+{: #optimization-fixes-v4-2-0}
+
+- Implement custom delegators for drop methods ([#8183]({{ site.repository }}/issues/8183))
+- Handle `nil` argument to `Jekyll.sanitized_path` ([#8415]({{ site.repository }}/issues/8415))
+- Cache `Jekyll.sanitized_path` ([#8424]({{ site.repository }}/issues/8424))
+- Memoize array of drop getter method names ([#8421]({{ site.repository }}/issues/8421))
+- Reduce string allocations from the `link` tag ([#8387]({{ site.repository }}/issues/8387))
+- Optimize parsing of parameters in `include` tag ([#8192]({{ site.repository }}/issues/8192))
+- Stash documents `write?` attribute in a variable ([#8389]({{ site.repository }}/issues/8389))
+- Reduce string allocations from generating doc URLs ([#8392]({{ site.repository }}/issues/8392))
+- Check if site is in incremental mode optimally ([#8401]({{ site.repository }}/issues/8401))
+- Utilize flexibility of `Site#in_dest_dir` ([#8403]({{ site.repository }}/issues/8403))
+- Reduce allocations from rendering item as liquid ([#8406]({{ site.repository }}/issues/8406))
+- Compute relative_path of pages using PathManager ([#8408]({{ site.repository }}/issues/8408))
+- Reduce allocation from `normalize_whitespace` filter ([#8400]({{ site.repository }}/issues/8400))
+- Use `Regexp#match?` when `MatchData` is not required ([#8427]({{ site.repository }}/issues/8427))
+- Check default front matter scope against symbols ([#8393]({{ site.repository }}/issues/8393))
+- Stash frequently used `Drop` setter keys for reuse ([#8394]({{ site.repository }}/issues/8394))
+- Memoize defaults computed for Convertibles ([#8451]({{ site.repository }}/issues/8451))
+- Reduce array allocations from merging categories ([#8453]({{ site.repository }}/issues/8453))
+- Memoize destination of pages, documents and staticfiles ([#8458]({{ site.repository }}/issues/8458))
+- Reduce allocations from computing item property ([#8485]({{ site.repository }}/issues/8485))
+- Optimize `Page#dir` with a private method ([#8489]({{ site.repository }}/issues/8489))
+- Stash attribute hash for Liquid computed for pages ([#8497]({{ site.repository }}/issues/8497))
+
+### Development Fixes
+{: #development-fixes-v4-2-0}
+
+- Update cucumber gem to version 4.1 ([#8278]({{ site.repository }}/issues/8278))
+- Move permalink styles data to constant ([#8282]({{ site.repository }}/issues/8282))
+- Update rubocop gem to 0.87.1 ([#8287]({{ site.repository }}/issues/8287))
+- Update RuboCop to-do file ([#8296]({{ site.repository }}/issues/8296))
+- Fix `rake console` generating LoadError ([#8312]({{ site.repository }}/issues/8312))
+- Configure Performance cops ([#8369]({{ site.repository }}/issues/8369))
+- Update rubocop gem to 0.90.0 ([#8313]({{ site.repository }}/issues/8313))
+- Refactor `Jekyll::Utils::Platforms` ([#7236]({{ site.repository }}/issues/7236))
+- Bump RuboCop to v0.91.x ([#8391]({{ site.repository }}/issues/8391))
+- Add workflow to build and profile third-party repo ([#8398]({{ site.repository }}/issues/8398))
+- Bump RuboCop to v0.92.x
+- Update cucumber gem version to 5.1.2 ([#8413]({{ site.repository }}/issues/8413))
+- Fix test suite compatibility with JRuby ([#8418]({{ site.repository }}/issues/8418))
+- chore(deps): bump Rubocop to 0.93.0 ([#8430]({{ site.repository }}/issues/8430))
+- Use Ruby 2.7.1 in GitHub Actions ([#8444]({{ site.repository }}/issues/8444))
+- Test that Liquid expressions are not deeply evaled ([#8292]({{ site.repository }}/issues/8292))
+- Test rendering arbitrary Liquid variables by default ([#7414]({{ site.repository }}/issues/7414))
+- Migrate TravisCI jobs to GitHub Actions ([#8492]({{ site.repository }}/issues/8492))
+
+### Documentation
+
+- Update pointer to special permalink variables for collections ([#8274]({{ site.repository }}/issues/8274))
+- Fix special treatment for 'page 1' in docs of pagination ([#8230]({{ site.repository }}/issues/8230))
+- Add Formcake to forms section ([#8283]({{ site.repository }}/issues/8283))
+- Add a note on the rendering process in the docs ([#8291]({{ site.repository }}/issues/8291))
+- Add refactoring type to PULL_REQUEST_TEMPLATE ([#8297]({{ site.repository }}/issues/8297))
+- Update resources.md ([#7864]({{ site.repository }}/issues/7864))
+- Extra apostrophes in an URL ([#8319]({{ site.repository }}/issues/8319))
+- Clarify target of subordinate clause ([#8320]({{ site.repository }}/issues/8320))
+- Cherry-pick commits from conflicting branch `docs-40`
+- Update documentation on third party site ([#8352]({{ site.repository }}/issues/8352))
+- Update default.md with info requested in [#8314]({{ site.repository }}/issues/8314) ([#8353]({{ site.repository }}/issues/8353))
+- Clarify description of `safe` option ([#8354]({{ site.repository }}/issues/8354))
+- Simplifying the Git post-receive hook-example ([#8358]({{ site.repository }}/issues/8358))
+- Add missing doc for build and serve commands ([#8365]({{ site.repository }}/issues/8365))
+- Docs Review: Getting Started ([#8372]({{ site.repository }}/issues/8372))
+- Add note about rebooting system after installation ([#8359]({{ site.repository }}/issues/8359))
+- Use data file to render table at `/docs/configuration/options/#global-configuration` ([#8377]({{ site.repository }}/issues/8377))
+- Use data file(s) to render table(s) at `/docs/configuration/options/` ([#8380]({{ site.repository }}/issues/8380))
+- Improve maintainability of config option data ([#8383]({{ site.repository }}/issues/8383))
+- Remove CircleCI v1 docs ([#8410]({{ site.repository }}/issues/8410))
+- Remove `NOKOGIRI_USE_SYSTEM_LIBRARIES` from Travis CI docs ([#8409]({{ site.repository }}/issues/8409))
+- Add links to all Jekyll themes on GitHub tagged with #jekyll-theme ([#8447]({{ site.repository }}/issues/8447))
+- Document initializing project Gemfile from scratch ([#8450]({{ site.repository }}/issues/8450))
+- Document installation of additional dependencies for installing Jekyll on Fedora ([#8456]({{ site.repository }}/issues/8456))
+- Improve documentation on Hooks in Jekyll ([#8467]({{ site.repository }}/issues/8467))
+- Build docs site with GitHub Actions ([#8201]({{ site.repository }}/issues/8201))
+- Add link to Assets page from `_sass` section in `_docs/structure.md` ([#8486]({{ site.repository }}/issues/8486))
+
+### Site Enhancements
+{: #site-enhancements-v4-2-0}
+
+- Fix rendering of *showcase* images ([#8504]({{ site.repository }}/issues/8504))
+
+
+## 4.1.1 / 2020-06-24
+{: #v4-1-1}
+
+### Bug Fixes
+{: #bug-fixes-v4-1-1}
+
+- Disable page excerpts by default ([#8222]({{ site.repository }}/issues/8222))
+- Revert introduction of PageDrop ([#8221]({{ site.repository }}/issues/8221))
+- Don't generate excerpts for non-html pages ([#8234]({{ site.repository }}/issues/8234))
+- Make page excerpts consistent with doc excerpts ([#8236]({{ site.repository }}/issues/8236))
+
+### Documentation
+
+- Replace deprecated 'show' command with 'info' ([#8235]({{ site.repository }}/issues/8235))
+- Change name to ▲Vercel ([#8247]({{ site.repository }}/issues/8247))
+- Add language and examples to describe how to use the configuration op… ([#8249]({{ site.repository }}/issues/8249))
+- Fix missing yaml front matter colon and adjust/add clarifying language. ([#8250]({{ site.repository }}/issues/8250))
+- correct typo ([#8261]({{ site.repository }}/issues/8261))
+- Allow hyperlinks to specific filter documentation ([#8231]({{ site.repository }}/issues/8231))
+- Update link to Netlify step-by-step guide ([#8264]({{ site.repository }}/issues/8264))
+- Fix grammar in documentation section ([#8265]({{ site.repository }}/issues/8265))
+
+### Site Enhancements
+{: #site-enhancements-v4-1-1}
+
+- Including correct Sketch website ([#8241]({{ site.repository }}/issues/8241))
+- Release post for v4.1.1 ([#8243]({{ site.repository }}/issues/8243))
+
+### Development Fixes
+{: #development-fixes-v4-1-1}
+
+- Bump RuboCop to v0.85.x ([#8223]({{ site.repository }}/issues/8223))
+- Expect drive letter only on vanilla windows ([#8227]({{ site.repository }}/issues/8227))
+
+
+## 4.1.0 / 2020-05-27
+{: #v4-1-0}
+
+### Bug Fixes
+{: #bug-fixes-v4-1-0}
+
+- Memoize `absolute_url` and `relative_url` filters ([#7793]({{ site.repository }}/issues/7793))
+- Fix documentation comment for `Jekyll::Converters::Identity` ([#7883]({{ site.repository }}/issues/7883))
+- Optimize `Jekyll::Filters#item_property` ([#7696]({{ site.repository }}/issues/7696))
+- Allow multiple binary operators in `where_exp` filter ([#8047]({{ site.repository }}/issues/8047))
+- Fix documents custom-ordering logic ([#8028]({{ site.repository }}/issues/8028))
+- Use `layout.path` when rendering the Liquid layout ([#8069]({{ site.repository }}/issues/8069))
+- Reduce array allocations from `StaticFile#path` ([#8083]({{ site.repository }}/issues/8083))
+- Simplify `Jekyll::Renderer#validate_layout` ([#8064]({{ site.repository }}/issues/8064))
+- Add static file's basename to its `url_placeholder` ([#7908]({{ site.repository }}/issues/7908))
+- Clear cached Liquid template scope before render ([#7967]({{ site.repository }}/issues/7967))
+- Cache `URLFilter` results of string inputs per site ([#7990]({{ site.repository }}/issues/7990))
+- Use `platforms` instead of `install_if` in Gemfile ([#8140]({{ site.repository }}/issues/8140))
+- Config include trailing slash ([#8113]({{ site.repository }}/issues/8113))
+- Improve path normalization in liquid_renderer ([#8075]({{ site.repository }}/issues/8075))
+- Switch slugify regex to support more Unicode character groups ([#8167]({{ site.repository }}/issues/8167))
+- Check if entry is a directory once per enumerator ([#8177]({{ site.repository }}/issues/8177))
+- Filter out exclusively excluded entries sooner ([#7482]({{ site.repository }}/issues/7482))
+- Return `relative_url` if site.url is an empty string ([#7988]({{ site.repository }}/issues/7988))
+- Configure kramdown toc_levels as array by default ([#8015]({{ site.repository }}/issues/8015))
+- Reduce `Pathname` objects from front matter defaults ([#8067]({{ site.repository }}/issues/8067))
+- Simplify `Jekyll::Hooks.trigger` logic ([#8044]({{ site.repository }}/issues/8044))
+- Quicker categories for documents without superdirs ([#7987]({{ site.repository }}/issues/7987))
+- Reduce `Jekyll::Renderer` instances during a build ([#7570]({{ site.repository }}/issues/7570))
+- Escape regex characters in paths to match ([#8138]({{ site.repository }}/issues/8138))
+- Provide invokables for common drop query keys ([#8165]({{ site.repository }}/issues/8165))
+- Optimize path sanitization of default front matter ([#8154]({{ site.repository }}/issues/8154))
+- Initialize static files' data hash only if needed ([#8188]({{ site.repository }}/issues/8188))
+- Initialize include-files as Jekyll objects ([#8158]({{ site.repository }}/issues/8158))
+
+### Minor Enhancements
+{: #minor-enhancements-v4-1-0}
+
+- serve: add support for ECC certificates ([#7768]({{ site.repository }}/issues/7768))
+- Update `item_property` to recognize integers ([#7878]({{ site.repository }}/issues/7878))
+- Include `_config.yml` in a new theme's gemspec ([#7865]({{ site.repository }}/issues/7865))
+- Add an option to easily disable disk-cache ([#7928]({{ site.repository }}/issues/7928))
+- Optimize markdown parsing with Kramdown by reusing the options and parser objects ([#8013]({{ site.repository }}/issues/8013))
+- Add `PageDrop` to provide Liquid templates with data ([#7992]({{ site.repository }}/issues/7992))
+- Optimize `Kramdown::JekyllDocument#to_html` calls ([#8041]({{ site.repository }}/issues/8041))
+- Configure default language for syntax-highlighting ([#8035]({{ site.repository }}/issues/8035))
+- Remove dev dependencies from new theme-gem gemspec ([#8042]({{ site.repository }}/issues/8042))
+- Allow disabling import of theme configuration ([#8131]({{ site.repository }}/issues/8131))
+- Allow excerpts to be generated for `Page` objects ([#7642]({{ site.repository }}/issues/7642))
+- Profile various stages of a site's build process ([#6760]({{ site.repository }}/issues/6760))
+- Add find filters to optimize where-first chains ([#8171]({{ site.repository }}/issues/8171))
+- Make `number_of_words` filter respect CJK characters ([#7813]({{ site.repository }}/issues/7813))
+- Allow extensionless document in a strict site ([#7950]({{ site.repository }}/issues/7950))
+- Add `:slugified_categories` URL placeholder ([#8094]({{ site.repository }}/issues/8094))
+
+### Documentation
+
+- Add dropped 'title: Staff' to the code ([#7805]({{ site.repository }}/issues/7805))
+- Clarify docs for static files in collection ([#7812]({{ site.repository }}/issues/7812))
+- Rephrase the CircleCI v2 section ([#7815]({{ site.repository }}/issues/7815))
+- Update old GitHub wiki URL with new one ([#7823]({{ site.repository }}/issues/7823))
+- Update JekyllConf page with 2019 talks ([#7826]({{ site.repository }}/issues/7826))
+- link for memberships ([#7825]({{ site.repository }}/issues/7825))
+- Doc: minor fix, should be greater or equal to min version ([#7856]({{ site.repository }}/issues/7856))
+- Update third-party.md - Fix broken link ([#7857]({{ site.repository }}/issues/7857))
+- clarify _config.yml/collections type ([#7873]({{ site.repository }}/issues/7873))
+- Replace backticks with HTML tags in data file ([#7879]({{ site.repository }}/issues/7879))
+- add new theme source ([#7875]({{ site.repository }}/issues/7875))
+- fixed grammatical error (it's --> its) ([#7887]({{ site.repository }}/issues/7887))
+- Docs: Clarify organizing pages into subfolders ([#7896]({{ site.repository }}/issues/7896))
+- Disambiguate the placeholder of permalink ([#7906]({{ site.repository }}/issues/7906))
+- docs: add short serve command for livereload ([#7919]({{ site.repository }}/issues/7919))
+- docs: add options for watch and force polling ([#7918]({{ site.repository }}/issues/7918))
+- add install instructions for ArchLinux and openSUSE ([#7920]({{ site.repository }}/issues/7920))
+- Improve index page of Jekyll documentation  ([#7926]({{ site.repository }}/issues/7926))
+- Include path in `jekyll new` commands (Usage docs) ([#7931]({{ site.repository }}/issues/7931))
+- Change `affect` to `effect` in the collections docs ([#7937]({{ site.repository }}/issues/7937))
+- Changed deprecated command in themes documentation ([#7941]({{ site.repository }}/issues/7941))
+- Adds some documentation for the `:clean`, `:on_obsolete` hook ([#7954]({{ site.repository }}/issues/7954))
+- docs: fix broken link ([#7955]({{ site.repository }}/issues/7955))
+- Corrected typo ([#7975]({{ site.repository }}/issues/7975))
+- docs: remove watch option in config ([#7940]({{ site.repository }}/issues/7940))
+- Correct a sentence in the documentation ([#7978]({{ site.repository }}/issues/7978))
+- Fix YAML representation of `group_by` result ([#7979]({{ site.repository }}/issues/7979))
+- Move `--baseurl` to build command options ([#7985]({{ site.repository }}/issues/7985))
+- Correct documentation of filters ([#7989]({{ site.repository }}/issues/7989))
+- Document sorting two documents by their `date` ([#7870]({{ site.repository }}/issues/7870))
+- Fix English grammar error ([#7994]({{ site.repository }}/issues/7994))
+- Update 03-front-matter.md ([#7996]({{ site.repository }}/issues/7996))
+- Add Kentico Kontent CMS integration to resources ([#8000]({{ site.repository }}/issues/8000))
+- Update 07-assets.md ([#7413]({{ site.repository }}/issues/7413))
+- Fix file references in Step by Step Tutorial's Assets step ([#8007]({{ site.repository }}/issues/8007))
+- docs: improve highlighting of code blocks ([#8017]({{ site.repository }}/issues/8017))
+- remove leading slash from Sass file location ([#8021]({{ site.repository }}/issues/8021))
+- [Docs] Fix asset link ref in step-by-step tutorial ([#8026]({{ site.repository }}/issues/8026))
+- Corrected command to modify PATH ([#8029]({{ site.repository }}/issues/8029))
+- Corrected command to modify PATH ([#8030]({{ site.repository }}/issues/8030))
+- Docs: Render full contents of just the latest post ([#8032]({{ site.repository }}/issues/8032))
+- docs: improvements for note boxes ([#8037]({{ site.repository }}/issues/8037))
+- Non-deprecated `vendor/bundle` path configuration ([#8048]({{ site.repository }}/issues/8048))
+- Update 09-collections.md ([#8060]({{ site.repository }}/issues/8060))
+- Remove extra paragraph tags ([#8063]({{ site.repository }}/issues/8063))
+- Add default front matter for tutorials collection ([#8081]({{ site.repository }}/issues/8081))
+- Create CSV to table tutorial ([#8090]({{ site.repository }}/issues/8090))
+- Add version badge for Custom Sorting of Documents ([#8098]({{ site.repository }}/issues/8098))
+- Docs: Fix grammar in `_docs/front-matter.md` ([#8097]({{ site.repository }}/issues/8097))
+- Update variables.md ([#8106]({{ site.repository }}/issues/8106))
+- Add help about Gentoo/Linux ([#8002]({{ site.repository }}/issues/8002))
+- Update documentation on third party site ([#8122]({{ site.repository }}/issues/8122))
+- Added Clear Linux ([#8132]({{ site.repository }}/issues/8132))
+- Added note about OS specific installation instructions. ([#8135]({{ site.repository }}/issues/8135))
+- Fix broken URL in the Resources Page on the Documentation Site ([#8136]({{ site.repository }}/issues/8136))
+- Docs: Deploy Jekyll site with GitHub Actions ([#8119]({{ site.repository }}/issues/8119))
+- Clarify `bundle config` in Bundler tutorial ([#8150]({{ site.repository }}/issues/8150))
+- docs: update your-first-plugin.md ([#8147]({{ site.repository }}/issues/8147))
+- Fix typo in documentation on GitHub Actions ([#8162]({{ site.repository }}/issues/8162))
+- Ease discovery of CLI commands (in their entirety) ([#8178]({{ site.repository }}/issues/8178))
+- Remove `sudo` from Travis CI tutorial ([#8187]({{ site.repository }}/issues/8187))
+- Add Gitlab Pages to 3rd party list ([#8191]({{ site.repository }}/issues/8191))
+- docs: add 21yunbox for deployment ([#8193]({{ site.repository }}/issues/8193))
+- Improve documentation on tags and categories ([#8196]({{ site.repository }}/issues/8196))
+
+### Development Fixes
+{: #development-fixes-v4-1-0}
+
+- Ci/GitHub actions ([#7822]({{ site.repository }}/issues/7822))
+- Rubocop version upgrade ([#7846]({{ site.repository }}/issues/7846))
+- Split action steps to avoid using `&&` on Windows ([#7885]({{ site.repository }}/issues/7885))
+- Upgrade rake to use version 13 ([#7910]({{ site.repository }}/issues/7910))
+- Update dependency constraint to allow RuboCop v0.76 ([#7893]({{ site.repository }}/issues/7893))
+- Use bash executable consistently ([#7909]({{ site.repository }}/issues/7909))
+- Test with JRuby 9.2.9.0 ([#7779]({{ site.repository }}/issues/7779))
+- Bump RuboCop to v0.79.x ([#7970]({{ site.repository }}/issues/7970))
+- Remove post-install message from gemspec ([#7974]({{ site.repository }}/issues/7974))
+- Attain Ruby 3.0 compatibility ([#7948]({{ site.repository }}/issues/7948))
+- Test `where` filter handling numeric property values ([#7821]({{ site.repository }}/issues/7821))
+- chore(deps): rubocop 0.80.0 ([#8012]({{ site.repository }}/issues/8012))
+- Update unit tests for Kramdown-based converter ([#8014]({{ site.repository }}/issues/8014))
+- Add Visual Studio Code Development Container ([#8016]({{ site.repository }}/issues/8016))
+- chore: simplify require for `Jekyll::VERSION` ([#8057]({{ site.repository }}/issues/8057))
+- Remove version-constraint relaxation for i18n gem ([#8055]({{ site.repository }}/issues/8055))
+- Mirror `spec.homepage` as `metadata["homepage_uri"]` ([#8056]({{ site.repository }}/issues/8056))
+- Bump Ruby versions on Travis builds ([#8088]({{ site.repository }}/issues/8088))
+- chore(ci): cache dependencies ([#8168]({{ site.repository }}/issues/8168))
+
+### Site Enhancements
+{: #site-enhancements-v4-1-0}
+
+- Optimize rendering of the documentation site ([#8020]({{ site.repository }}/issues/8020))
+- Utilize `relative_url` filter in documentation site ([#8089]({{ site.repository }}/issues/8089))
+- Render tutorial metadata in documentation site ([#8092]({{ site.repository }}/issues/8092))
+- Improve syntax-highlighting in documentation site ([#8079]({{ site.repository }}/issues/8079))
+- Site: Filter through just the *docs* collection ([#8170]({{ site.repository }}/issues/8170))
+
+
+## 4.0.1 / 2020-05-08
+{: #v4-0-1}
+
+### Bug Fixes
+{: #bug-fixes-v4-0-1}
+
+- Prevent console warning with Ruby 2.7 ([#8124]({{ site.repository }}/issues/8124))
+- Clear cached Liquid template scope before render ([#8141]({{ site.repository }}/issues/8141))
+- Add static file's basename to its url_placeholder ([#8142]({{ site.repository }}/issues/8142))
+- Update item_property to recognize integers ([#8160]({{ site.repository }}/issues/8160))
+
+### Development Fixes
+{: #development-fixes-v4-0-1}
+
+- Fix Kramdown converter based tests for v4.0.x ([#8143]({{ site.repository }}/issues/8143))
+
+
+## 3.9.0 / 2020-08-05
+{: #v3-9-0}
+
+### Minor Enhancements
+{: #minor-enhancements-v3-9-0}
+
+- Allow use of kramdown v2 ([#8322]({{ site.repository }}/issues/8322))
+- Add default language for kramdown syntax highlighting ([#8325]({{ site.repository }}/issues/8325))
+
+
+## 3.8.7 / 2020-05-08
+{: #v3-8-7}
+
+### Bug Fixes
+{: #bug-fixes-v3-8-7}
+
+- Prevent console warnings with Ruby 2.7 ([#8125]({{ site.repository }}/issues/8125))
+
+
+## 4.0.0 / 2019-08-19
+{: #v4-0-0}
+
+### Major Enhancements
+{: #major-enhancements-v4-0-0}
+
+- Drop ruby 2.3 ([#7454]({{ site.repository }}/issues/7454))
+- Drop support for Ruby 2.1 and 2.2 ([#6560]({{ site.repository }}/issues/6560))
+- Drop support for older versions of Rouge ([#6978]({{ site.repository }}/issues/6978))
+- Drop support for pygments as syntax-highlighter ([#7118]({{ site.repository }}/issues/7118))
+- Drop support for Redcarpet ([#6987]({{ site.repository }}/issues/6987))
+- Drop support for rdiscount ([#6988]({{ site.repository }}/issues/6988))
+- Drop support for `jekyll-watch-1.4.0` and older ([#7287]({{ site.repository }}/issues/7287))
+- Incorporate `relative_url` filter in `link` tag ([#6727]({{ site.repository }}/issues/6727))
+- Upgrade kramdown dependency to v2.x ([#7492]({{ site.repository }}/issues/7492))
+- Upgrade jekyll-sass-converter to v2.x - Sassc + sourcemaps ([#7778]({{ site.repository }}/issues/7778))
+- Upgrade i18n to v1.x ([#6931]({{ site.repository }}/issues/6931))
+- Add `Jekyll::Cache` class to handle caching on disk ([#7169]({{ site.repository }}/issues/7169))
+- Cache converted markdown ([#7159]({{ site.repository }}/issues/7159))
+- Cache: Do not dump undumpable objects ([#7190]({{ site.repository }}/issues/7190))
+- Cache matched defaults sets for given parameters ([#6888]({{ site.repository }}/issues/6888))
+- Ignore cache directory ([#7184]({{ site.repository }}/issues/7184))
+- Add `Site#in_cache_dir` helper method ([#7160]({{ site.repository }}/issues/7160))
+- Remove 'cache_dir' during `jekyll clean` ([#7158]({{ site.repository }}/issues/7158))
+- Cache parsed Liquid templates in memory ([#7136]({{ site.repository }}/issues/7136))
+- Only read layouts from source_dir or theme_dir ([#6788]({{ site.repository }}/issues/6788))
+- Allow custom sorting of collection documents ([#7427]({{ site.repository }}/issues/7427))
+- Always exclude certain paths from being processed ([#7188]({{ site.repository }}/issues/7188))
+- Remove Jekyll::Utils#strip_heredoc in favor of a Ruby > 2.3 built in ([#7584]({{ site.repository }}/issues/7584))
+- Incorporate `relative_url` within `post_url` tag ([#7589]({{ site.repository }}/issues/7589))
+- Remove patch to modify config for kramdown ([#7699]({{ site.repository }}/issues/7699))
+
+### Minor Enhancements
+{: #minor-enhancements-v4-0-0}
+
+- Enhance `--blank` scaffolding ([#7310]({{ site.repository }}/issues/7310))
+- Use `jekyll-compose` if installed ([#6932]({{ site.repository }}/issues/6932))
+- Disable Liquid via front matter ([#6824]({{ site.repository }}/issues/6824))
+- Configure cache_dir ([#7232]({{ site.repository }}/issues/7232))
+- ISO week date drops ([#5981]({{ site.repository }}/issues/5981))
+- Fix custom 404 page for GitHub pages ([#7132]({{ site.repository }}/issues/7132))
+- Load config file from within current theme-gem ([#7304]({{ site.repository }}/issues/7304))
+- Suggest re-running command with `--trace` on fail ([#6551]({{ site.repository }}/issues/6551))
+- Support for binary operators in where_exp filter ([#6998]({{ site.repository }}/issues/6998))
+- Automatically load `_config.toml` ([#7299]({{ site.repository }}/issues/7299))
+- Add vendor folder to a newly installed site's .gitignore ([#6968]({{ site.repository }}/issues/6968))
+- Output Jekyll Version while debugging ([#7173]({{ site.repository }}/issues/7173))
+- Memoize computing excerpt's relative_path ([#6951]({{ site.repository }}/issues/6951))
+- Skip processing posts that can not be read ([#7302]({{ site.repository }}/issues/7302))
+- Memoize the return value of Site#documents ([#7273]({{ site.repository }}/issues/7273))
+- Cache globbed paths in front matter defaults ([#7345]({{ site.repository }}/issues/7345))
+- Cache computed item property ([#7301]({{ site.repository }}/issues/7301))
+- Cleanup Markdown converter ([#7519]({{ site.repository }}/issues/7519))
+- Do not process Liquid in post excerpt when disabled in front matter ([#7146]({{ site.repository }}/issues/7146))
+- Liquefied link tag ([#6269]({{ site.repository }}/issues/6269))
+- Update item_property to return numbers as numbers instead of strings ([#6608]({{ site.repository }}/issues/6608))
+- Use `.markdown` extension for page templates ([#7126]({{ site.repository }}/issues/7126))
+- Add support for `*.xhtml` files ([#6854]({{ site.repository }}/issues/6854))
+- Allow i18n v0.9.5 and higher ([#7044]({{ site.repository }}/issues/7044))
+- Ignore permission error of /proc/version ([#7267]({{ site.repository }}/issues/7267))
+- Strip extra slashes via `Jekyll.sanitized_path` ([#7182]({{ site.repository }}/issues/7182))
+- Site template: remove default config for markdown ([#7285]({{ site.repository }}/issues/7285))
+- Add a custom inspect string for StaticFile objects ([#7422]({{ site.repository }}/issues/7422))
+- Remind user to include gem in the Gemfile on error ([#7476]({{ site.repository }}/issues/7476))
+- Search Front matter defaults for Page objects with relative_path ([#7261]({{ site.repository }}/issues/7261))
+- Lock use of `tzinfo` gem to v1.x ([#7521]({{ site.repository }}/issues/7521), [#7562]({{ site.repository }}/issues/7562))
+- Utilize absolute paths of user-provided file paths ([#7450]({{ site.repository }}/issues/7450))
+- Detect `nil` and empty values in objects with `where` filter ([#7580]({{ site.repository }}/issues/7580))
+- Initialize mutations for Drops only if necessary ([#7657]({{ site.repository }}/issues/7657))
+- Reduce Array allocations via Jekyll::Cleaner ([#7659]({{ site.repository }}/issues/7659))
+- Encode and unencode urls only as required ([#7654]({{ site.repository }}/issues/7654))
+- Reduce string allocations with better alternatives ([#7643]({{ site.repository }}/issues/7643))
+- Reduce allocations from Jekyll::Document instances ([#7625]({{ site.repository }}/issues/7625))
+- Add `type` attribute to Document instances ([#7406]({{ site.repository }}/issues/7406))
+- Reduce allocations from where-filter ([#7653]({{ site.repository }}/issues/7653))
+- Memoize SiteDrop#documents to reduce allocations ([#7697]({{ site.repository }}/issues/7697))
+- Add PathManager class to cache interim paths ([#7732]({{ site.repository }}/issues/7732))
+- Remove warnings and fixes for deprecated config ([#7440]({{ site.repository }}/issues/7440))
+- Delegate --profile tabulation to `terminal-table` ([#7627]({{ site.repository }}/issues/7627))
+
+### Bug Fixes
+{: #bug-fixes-v4-0-0}
+
+- Security: fix `include` bypass of `EntryFilter#filter` symlink check ([#7226]({{ site.repository }}/issues/7226))
+- Theme gems: ensure directories aren't symlinks ([#7419]({{ site.repository }}/issues/7419))
+- Add call to unused method `validate_options` in `commands/serve.rb` ([#7122]({{ site.repository }}/issues/7122))
+- Check if scope applies to type before given path ([#7263]({{ site.repository }}/issues/7263))
+- Document two methods, simplify one of the methods ([#7270]({{ site.repository }}/issues/7270))
+- Check key in collections only if it isn't "posts" ([#7277]({{ site.repository }}/issues/7277))
+- Interpolate Jekyll::Page subclass on inspection ([#7203]({{ site.repository }}/issues/7203))
+- Measure the no. of times a template gets rendered ([#7316]({{ site.repository }}/issues/7316))
+- Reduce array traversal in Jekyll::Reader ([#7157]({{ site.repository }}/issues/7157))
+- Re-implement handling Liquid blocks in excerpts ([#7250]({{ site.repository }}/issues/7250))
+- Documents should be able to render their date ([#7404]({{ site.repository }}/issues/7404))
+- Fix Interpreter warning from Jekyll::Renderer ([#7448]({{ site.repository }}/issues/7448))
+- Loggers should accept both numbers and symbols ([#6967]({{ site.repository }}/issues/6967))
+- Replace regex arg to :gsub with a string arg ([#7189]({{ site.repository }}/issues/7189))
+- Dont write static files from unrendered collection ([#7410]({{ site.repository }}/issues/7410))
+- Excerpt handling of custom and intermediate tags ([#7382]({{ site.repository }}/issues/7382))
+- Change future post loglevel to warn to help user narrow down issues ([#7527]({{ site.repository }}/issues/7527))
+- Handle files with trailing dots in their basename ([#7315]({{ site.repository }}/issues/7315))
+- Fix unnecessary allocations via StaticFileReader ([#7572]({{ site.repository }}/issues/7572))
+- Don't check if site URL is absolute if it is nil ([#7498]({{ site.repository }}/issues/7498))
+- Avoid unnecessary duplication of pages array ([#7272]({{ site.repository }}/issues/7272))
+- Memoize Site#post_attr_hash ([#7276]({{ site.repository }}/issues/7276))
+- Memoize Document#excerpt_separator ([#7569]({{ site.repository }}/issues/7569))
+- Optimize Document::DATE_FILENAME_MATCHER to match valid filenames ([#7292]({{ site.repository }}/issues/7292))
+- Escape valid special chars in a site's path name ([#7568]({{ site.repository }}/issues/7568))
+- Replace `name` in Page#inspect with relative_path ([#7434]({{ site.repository }}/issues/7434))
+- Log a warning when the slug is empty ([#7357]({{ site.repository }}/issues/7357))
+- Push Markdown link refs to excerpt only as required ([#7577]({{ site.repository }}/issues/7577))
+- Fix broken include_relative usage in excerpt ([#7633]({{ site.repository }}/issues/7633))
+- Initialize and reset glob_cache only as necessary ([#7658]({{ site.repository }}/issues/7658))
+- Revert memoizing Site#docs_to_write and #documents ([#7684]({{ site.repository }}/issues/7684))
+- Backport [#7684]({{ site.repository }}/issues/7684) for v3.8.x: Revert memoizing Site#docs_to_write and refactor #documents ([#7689]({{ site.repository }}/issues/7689))
+- Backport [#7213]({{ site.repository }}/issues/7213) and [#7633]({{ site.repository }}/issues/7633) for v3.8.x: Fix broken include_relative usage in excerpt ([#7690]({{ site.repository }}/issues/7690))
+- Don't read symlinks in site.include in safe mode ([#7711]({{ site.repository }}/issues/7711))
+- Replace `String#=~` with `String#match?` ([#7723]({{ site.repository }}/issues/7723))
+- Update log output for an invalid theme directory ([#7679]({{ site.repository }}/issues/7679))
+- Remove configuration of theme sass files from Core ([#7290]({{ site.repository }}/issues/7290))
+- Actually conditionally include liquid-c ([#7792]({{ site.repository }}/issues/7792))
+- Test number_like regex on stringified property ([#7788]({{ site.repository }}/issues/7788))
+
+### Development Fixes
+{: #development-fixes-v4-0-0}
+
+- Upgrade liquid-c to v4.0 ([#7375]({{ site.repository }}/issues/7375))
+- Bump RuboCop to v0.71.0 ([#7687]({{ site.repository }}/issues/7687))
+- Target Ruby 2.4 syntax ([#7583]({{ site.repository }}/issues/7583))
+- Fix: RuboCop offenses ([#7769]({{ site.repository }}/issues/7769))
+- Use communicative method parameters ([#7566]({{ site.repository }}/issues/7566))
+- Scan `assert_equal` methods and rectify any offenses with a custom RuboCop cop ([#7130]({{ site.repository }}/issues/7130))
+- CI: Test with Ruby 2.6 ([#7438]({{ site.repository }}/issues/7438))
+- CI: Test with Ruby 2.6 on AppVeyor ([#7518]({{ site.repository }}/issues/7518))
+- CI: Update RuboCop config ([#7050]({{ site.repository }}/issues/7050))
+- CI: Add a script to profile docs ([#7540]({{ site.repository }}/issues/7540))
+- CI(Appveyor): shallow clone with 5 last commits ([#7312]({{ site.repository }}/issues/7312))
+- CI: Test with oldest and latest Ruby only ([#7412]({{ site.repository }}/issues/7412))
+- CI: Update excludes for CodeClimate Analyses ([#7365]({{ site.repository }}/issues/7365))
+- CI: Lock Travis to Bundler-1.16.2 ([#7144]({{ site.repository }}/issues/7144))
+- CI: Bump tested version of JRuby to 9.2.7.0 ([#7612]({{ site.repository }}/issues/7612))
+- CI: Do not install docs on updating gems on Travis ([#7706]({{ site.repository }}/issues/7706))
+- Update gemspec ([#7425]({{ site.repository }}/issues/7425))
+- deps: relax version constraint on classifier-reborn gem ([#7471]({{ site.repository }}/issues/7471))
+- deps: update yajl-ruby ([#7278]({{ site.repository }}/issues/7278))
+- deps: bump yajl-ruby to v1.4.0 ([#6976]({{ site.repository }}/issues/6976))
+- Create symlink only if target is accessible ([#7429]({{ site.repository }}/issues/7429))
+- Switch to `:install_if` for wdm gem ([#7372]({{ site.repository }}/issues/7372))
+- Add cucumber feature to test include_relative tag ([#7213]({{ site.repository }}/issues/7213))
+- Small benchmark refactoring ([#7211]({{ site.repository }}/issues/7211))
+- Fix incorrectly passed arguments to assert_equal ([#7134]({{ site.repository }}/issues/7134))
+- fix up refute_equal call ([#7133]({{ site.repository }}/issues/7133))
+- Fix RuboCop offences in test files ([#7128]({{ site.repository }}/issues/7128))
+- Use assert_include ([#7093]({{ site.repository }}/issues/7093))
+- Remember to release docs gem ([#7066]({{ site.repository }}/issues/7066))
+- Useless privates removed ([#6768]({{ site.repository }}/issues/6768))
+- Load Rouge for TestKramdown ([#7007]({{ site.repository }}/issues/7007))
+- Update instructions for releasing docs Gem ([#6975]({{ site.repository }}/issues/6975))
+- We are not using Ruby 2.2 anymore ([#6977]({{ site.repository }}/issues/6977))
+- Remove unnecessary Jekyll::Page constant ([#6770]({{ site.repository }}/issues/6770))
+- Remove unused error class ([#6511]({{ site.repository }}/issues/6511))
+- Add a Cucumber feature for post_url tag ([#7586]({{ site.repository }}/issues/7586))
+- Generate a "TOTAL" row for build-profile table ([#7614]({{ site.repository }}/issues/7614))
+- Refactor Jekyll::Cache ([#7532]({{ site.repository }}/issues/7532))
+- Store list of expected extnames in a constant ([#7638]({{ site.repository }}/issues/7638))
+- Profile allocations from a build session ([#7646]({{ site.repository }}/issues/7646))
+- Update small typo in contributing.md ([#7671]({{ site.repository }}/issues/7671))
+- Remove override to Jekyll::Document#respond_to? ([#7695]({{ site.repository }}/issues/7695))
+- Update TestTags in sync with Rouge v3.4 ([#7709]({{ site.repository }}/issues/7709))
+- Use regexp to filter special entries ([#7702]({{ site.repository }}/issues/7702))
+- Reduce Array objects generated from utility method ([#7749]({{ site.repository }}/issues/7749))
+- Update mime.types ([#7756]({{ site.repository }}/issues/7756))
+- Replace redundant Array#map with Array#each ([#7761]({{ site.repository }}/issues/7761))
+- Reduce allocations by using #each_with_object ([#7758]({{ site.repository }}/issues/7758))
+- Memoize fallback_data for Drop ([#7728]({{ site.repository }}/issues/7728))
+- Use String#end_with? to check if entry is a backup ([#7701]({{ site.repository }}/issues/7701))
+
+### Documentation
+
+- Refactor docs ([#7205]({{ site.repository }}/issues/7205))
+- Add a link to Giraffe Academy's tutorial ([#7325]({{ site.repository }}/issues/7325))
+- Do not advise users to install Jekyll outside of Bundler ([#6927]({{ site.repository }}/issues/6927))
+- Remove documentation for using Redcarpet ([#6990]({{ site.repository }}/issues/6990))
+- Install Docs that Work on MacOS 10.14 ([#7561]({{ site.repository }}/issues/7561))
+- Add Installation Instructions for Ubuntu ([#6925]({{ site.repository }}/issues/6925))
+- Don't prompt for sudo when installing with Ubuntu WSL ([#6781]({{ site.repository }}/issues/6781))
+- Installation instructions for Fedora ([#7198]({{ site.repository }}/issues/7198))
+- Update Windows install docs ([#6926]({{ site.repository }}/issues/6926))
+- List all standard liquid filters ([#7333]({{ site.repository }}/issues/7333))
+- List all static files variables ([#7002]({{ site.repository }}/issues/7002))
+- Improve how to include Rouge stylesheets ([#7752]({{ site.repository }}/issues/7752))
+- Mention CommonMark plugins ([#7418]({{ site.repository }}/issues/7418))
+- Add TSV to list of supported _data files. ([#7168]({{ site.repository }}/issues/7168))
+- How to deploy using pre-push git hook ([#7179]({{ site.repository }}/issues/7179))
+- Hosting with AWS Amplify ([#7510]({{ site.repository }}/issues/7510))
+- CircleCI deployment through CircleCI v2 ([#7024]({{ site.repository }}/issues/7024))
+- GitHub Pages: use themes from other repos ([#7112]({{ site.repository }}/issues/7112))
+- Document page.dir and page.name ([#7373]({{ site.repository }}/issues/7373))
+- Document custom tag blocks ([#7359]({{ site.repository }}/issues/7359))
+- Document converter methods ([#7289]({{ site.repository }}/issues/7289))
+- Document {% raw %}`{{ page.collection }}`{% endraw %} ([#7430]({{ site.repository }}/issues/7430))
+- Document Jekyll Filters with YAML data ([#7335]({{ site.repository }}/issues/7335))
+- Document where Jekyll looks for layouts in a site ([#7564]({{ site.repository }}/issues/7564))
+- plugin: liquid tag jekyll-flickr ([#6946]({{ site.repository }}/issues/6946))
+- plugin: jekyll-target-blank ([#7046]({{ site.repository }}/issues/7046))
+- plugin: json-get. ([#7086]({{ site.repository }}/issues/7086))
+- plugin: `jekyll-info` ([#7091]({{ site.repository }}/issues/7091))
+- plugin: jekyll-xml-source ([#7114]({{ site.repository }}/issues/7114))
+- plugin: jekyll-firstimage filter ([#7127]({{ site.repository }}/issues/7127))
+- plugin: CAT ([#7011]({{ site.repository }}/issues/7011))
+- Resources: Statictastic ([#7593]({{ site.repository }}/issues/7593))
+- Resources: Bonsai Search ([#7543]({{ site.repository }}/issues/7543))
+- Resources: Formspark ([#7601]({{ site.repository }}/issues/7601))
+- Resources: Jekpack([#7598]({{ site.repository }}/issues/7598))
+- Resources: formX ([#7536]({{ site.repository }}/issues/7536))
+- Resources: 99inbound's Jekyll post ([#7348]({{ site.repository }}/issues/7348))
+- Resources: CloudSh ([#7497]({{ site.repository }}/issues/7497))
+- Community:  DEV Community's Jekyll tag ([#7139]({{ site.repository }}/issues/7139))
+- Showcase: developer.spotify.com ([#7217]({{ site.repository }}/issues/7217))
+- Showcase: Isomer ([#7300]({{ site.repository }}/issues/7300))
+- Add version number for group_by_exp doc ([#6956]({{ site.repository }}/issues/6956))
+- Updated nginx configuration for custom-404-page documentation ([#6994]({{ site.repository }}/issues/6994))
+- Clarify definition of 'draft' ([#7037]({{ site.repository }}/issues/7037))
+- _drafts need to be contained within the custom collection directory ([#6985]({{ site.repository }}/issues/6985))
+- Updated to supported version ([#7031]({{ site.repository }}/issues/7031))
+- Add Hints for some Improved Travis Config in Doc ([#7049]({{ site.repository }}/issues/7049))
+- Update travis-ci.md to point out "this is an example Gemfile" ([#7089]({{ site.repository }}/issues/7089))
+- Instructions to view theme’s files under Linux ([#7095]({{ site.repository }}/issues/7095))
+- Use a real theme in the example ([#7125]({{ site.repository }}/issues/7125))
+- Update docs about post creation ([#7138]({{ site.repository }}/issues/7138))
+- Initialize upgrading doc for v4.0 ([#7140]({{ site.repository }}/issues/7140))
+- Add version badge for date filters with ordinal ([#7162]({{ site.repository }}/issues/7162))
+- Corrected sample usage of postfiles ([#7181]({{ site.repository }}/issues/7181))
+- Resolve "Unable to locate package ruby2.4" error ([#7196]({{ site.repository }}/issues/7196))
+- Correct stylesheet url in tutorial step 7 ([#7210]({{ site.repository }}/issues/7210))
+- Removes quotes from markdown for assets ([#7223]({{ site.repository }}/issues/7223))
+- Clarified front matter requirement ([#7234]({{ site.repository }}/issues/7234))
+- Explicit location of where to create blog.html ([#7241]({{ site.repository }}/issues/7241))
+- Reference the build command options that allows multiple config files ([#7266]({{ site.repository }}/issues/7266))
+- Add more issue template(s) and pull request template ([#7269]({{ site.repository }}/issues/7269))
+- Suggest sites use OpenSSL instead of GnuTLS for their site's CI ([#7010]({{ site.repository }}/issues/7010))
+- Fix broken Contributors link in README.markdown ([#7200]({{ site.repository }}/issues/7200))
+- Add title tag to item in RSS template ([#7282]({{ site.repository }}/issues/7282))
+- Add link tag to item in RSS template ([#7291]({{ site.repository }}/issues/7291))
+- Remove redundant instruction comment ([#7342]({{ site.repository }}/issues/7342))
+- Textile is only supported through a converter plugin ([#7003]({{ site.repository }}/issues/7003))
+- Add recursive navigation tutorial ([#7720]({{ site.repository }}/issues/7720))
+- Remove installation instructions with Homebrew ([#7381]({{ site.repository }}/issues/7381))
+- Fix dead link and misleading prose ([#7383]({{ site.repository }}/issues/7383))
+- Fix content management section ([#7385]({{ site.repository }}/issues/7385))
+- Apply ruby official guide documents ([#7393]({{ site.repository }}/issues/7393))
+- Fix group_by_exp filter example ([#7394]({{ site.repository }}/issues/7394))
+- Remove alt attribute from a tags ([#7407]({{ site.repository }}/issues/7407))
+- Fix BASH code-block in ubuntu.md ([#7420]({{ site.repository }}/issues/7420))
+- zlib is missing ([#7428]({{ site.repository }}/issues/7428))
+- Fixed unnecessary aticles and pronouns ([#7466]({{ site.repository }}/issues/7466))
+- Store SSL key and cert in site source ([#7473]({{ site.repository }}/issues/7473))
+- Fix typo in tutorial for converting existing site ([#7524]({{ site.repository }}/issues/7524))
+- Check if var exists before include tag ([#7530]({{ site.repository }}/issues/7530))
+- Clarify docs on collections regarding the need for front matter ([#7538]({{ site.repository }}/issues/7538))
+- Fix incorrect Windows path in themes.md ([#7525]({{ site.repository }}/issues/7525))
+- Addresses bundle not found. ([#7351]({{ site.repository }}/issues/7351))
+- Update the contribution docs for draft pull requests ([#7619]({{ site.repository }}/issues/7619))
+- Data file section adds TSV ([#7640]({{ site.repository }}/issues/7640))
+- Indicate where the _sass folder is by default ([#7644]({{ site.repository }}/issues/7644))
+- Docs: add version tags to new placeholders ([#5981]({{ site.repository }}/issues/5981)) for permalinks ([#7647]({{ site.repository }}/issues/7647))
+- Solve "GitHub Page build failure" in 10-deployment.md ([#7648]({{ site.repository }}/issues/7648))
+- fix link to Site Source config ([#7708]({{ site.repository }}/issues/7708))
+- Introduce frontmatter in step 2 ([#7704]({{ site.repository }}/issues/7704))
+- Add @ashmaroli to Core Team listing ([#7398]({{ site.repository }}/issues/7398))
+- Lnk to Tidelift in site's footer ([#7377]({{ site.repository }}/issues/7377))
+- Link to OpenCollective backing ([#7378]({{ site.repository }}/issues/7378)
+- Link to sponsor listing in README ([#7405]({{ site.repository }}/issues/7405))
+- Adjust team page listings ([#7395]({{ site.repository }}/issues/7395))
+- Updates to CODE OF CONDUCT (v1.4.0) ([#7105]({{ site.repository }}/issues/7105))
+- More inclusive writing ([#7283]({{ site.repository }}/issues/7283))
+- Update Ruby version used in Travis-CI example ([#7783]({{ site.repository }}/issues/7783))
+- Documentation for binary operators in where_exp ([#7786]({{ site.repository }}/issues/7786))
+- Adding SmartForms as Forms service ([#7794]({{ site.repository }}/issues/7794))
+
+### Site Enhancements
+{: #site-enhancements-v4-0-0}
+
+- Better Performance ([#7388]({{ site.repository }}/issues/7388))
+- Add some minor improvements to image loading in Showcase page ([#7214]({{ site.repository }}/issues/7214))
+- Simplify assigning classname to docs' aside-links ([#7609]({{ site.repository }}/issues/7609))
+- Simplify couple of includes in the docs site ([#7607]({{ site.repository }}/issues/7607))
+- Avoid generating empty classnames ([#7610]({{ site.repository }}/issues/7610))
+- Minimize rendering count ([#7343]({{ site.repository }}/issues/7343))
+
+### Release
+
+- Jekyll v4.0 release ([#7782]({{ site.repository }}/issues/7782))
+- Release post for v4.0.0 beta1 ([#7716]({{ site.repository }}/issues/7716))
+- Release post for v4.0.0.pre.alpha1 ([#7574]({{ site.repository }}/issues/7574))
+- Release post for v3.8.0 ([#6849]({{ site.repository }}/issues/6849))
+- Release post for v3.6.3, v3.7.4 and v3.8.4 ([#7259]({{ site.repository }}/issues/7259))
+- Post: v4.0 development ([#6934]({{ site.repository }}/issues/6934))
+
+
+## 3.8.6 / 2019-07-02
+{: #v3-8-6}
+
+### Bug Fixes
+{: #bug-fixes-v3-8-6}
+
+- Update log output for an invalid theme directory ([#7734]({{ site.repository }}/issues/7734))
+- Memoize `SiteDrop#documents` to reduce allocations ([#7722]({{ site.repository }}/issues/7722))
+- Excerpt handling of custom and intermediate tags ([#7467]({{ site.repository }}/issues/7467))
+- Escape valid special chars in a site's path name ([#7573]({{ site.repository }}/issues/7573))
+- Revert memoizing `Site#docs_to_write` and refactor `#documents` ([#7689]({{ site.repository }}/issues/7689))
+- Fix broken `include_relative` usage in excerpt ([#7690]({{ site.repository }}/issues/7690))
+- Install platform-specific gems as required (3c06609406)
+
+### Security Fixes
+{: #security-fixes-v3-8-6}
+
+- Theme gems: ensure directories aren't symlinks ([#7424]({{ site.repository }}/issues/7424))
+
+
+## 3.8.5 / 2018-11-04
+{: #v3-8-5}
+
+### Bug Fixes
+{: #bug-fixes-v3-8-5}
+
+- Re-implement handling Liquid blocks in excerpts ([#7250]({{ site.repository }}/issues/7250))
+
+
+## 3.8.4 / 2018-09-18
+{: #v3-8-4}
+
+### Bug Fixes
+{: #bug-fixes-v3-8-4}
+
+- 3.8.x: security: fix `include` bypass of `EntryFilter#filter` symlink check ([#7228]({{ site.repository }}/issues/7228))
+
+
+## 3.8.3 / 2018-06-05
+{: #v3-8-3}
+
+### Bug Fixes
+{: #bug-fixes-v3-8-3}
+
+- Fix --unpublished not affecting collection documents ([#7027]({{ site.repository }}/issues/7027))
+
+
+## 3.8.2 / 2018-05-18
+{: #v3-8-2}
+
+### Development Fixes
+{: #development-fixes-v3-8-2}
+
+- Update rubocop version ([#7016]({{ site.repository }}/issues/7016))
+
+### Bug Fixes
+{: #bug-fixes-v3-8-2}
+
+- Add whitespace control to LIQUID_TAG_REGEX ([#7015]({{ site.repository }}/issues/7015))
+
+
 ## 3.8.1 / 2018-05-01
 {: #v3-8-1}
 
@@ -36,10 +734,10 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Minimize array allocations in the `where` filter ([#6860]({{ site.repository }}/issues/6860))
 - Bump JRuby ([#6878]({{ site.repository }}/issues/6878))
 - Assert existence of <collection>.files ([#6907]({{ site.repository }}/issues/6907))
-- Bump Rubocop to 0.54.x ([#6915]({{ site.repository }}/issues/6915))
+- Bump RuboCop to 0.54.x ([#6915]({{ site.repository }}/issues/6915))
 - Regenerate unconditionally unless its an incremental build ([#6917]({{ site.repository }}/issues/6917))
 - Centralize require statements ([#6910]({{ site.repository }}/issues/6910))
-- Bump to Rubocop 0.55 ([#6929]({{ site.repository }}/issues/6929))
+- Bump to RuboCop 0.55 ([#6929]({{ site.repository }}/issues/6929))
 - Refactor private method `HighlightBlock#parse_options` ([#6822]({{ site.repository }}/issues/6822))
 
 ### Minor Enhancements
@@ -114,6 +812,15 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Allow front matter defaults to be applied properly to documents gathered under custom `collections_dir` ([#6885]({{ site.repository }}/issues/6885))
 
 
+## 3.7.4 / 2018-09-07
+{: #v3-7-4}
+
+### Bug Fixes
+{: #bug-fixes-v3-7-4}
+
+- Security: fix `include` bypass of EntryFilter#filter symlink check ([#7224]({{ site.repository }}/issues/7224))
+
+
 ## 3.7.3 / 2018-02-25
 {: #v3-7-3}
 
@@ -295,6 +1002,15 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix permalink icon markup in news-item layout ([#6639]({{ site.repository }}/issues/6639))
 
 
+## 3.6.3 / 2018-09-18
+{: #v3-6-3}
+
+### Bug Fixes
+{: #bug-fixes-v3-6-3}
+
+- 3.6.x: security: fix `include` bypass of `EntryFilter#filter` symlink check ([#7229]({{ site.repository }}/issues/7229))
+
+
 ## 3.6.2 / 2017-10-21
 {: #v3-6-2}
 
@@ -377,7 +1093,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - add SUPPORT file for GitHub ([#6324]({{ site.repository }}/issues/6324))
 - Rename CODE_OF_CONDUCT to show in banner ([#6325]({{ site.repository }}/issues/6325))
 - Docs : illustrate page.id for a collection's document ([#6329]({{ site.repository }}/issues/6329))
-- Docs: post's date can be overriden in YAML front matter ([#6334]({{ site.repository }}/issues/6334))
+- Docs: post's date can be overriden in front matter ([#6334]({{ site.repository }}/issues/6334))
 - Docs: `site.url` behavior on development and production environments ([#6270]({{ site.repository }}/issues/6270))
 - Fix typo in site.url section of variables.md :-[ ([#6337]({{ site.repository }}/issues/6337))
 - Docs: updates ([#6343]({{ site.repository }}/issues/6343))
@@ -1099,7 +1815,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix typo on Chocolatey name in Windows documentation ([#4686]({{ site.repository }}/issues/4686))
 - Use the correct URL, Fixes [#4698]({{ site.repository }}/issues/4698) ([#4699]({{ site.repository }}/issues/4699))
 - Add jekyll-paspagon plugin ([#4700]({{ site.repository }}/issues/4700))
-- Bold-italicize note in assets documentation about needing yaml front matter ([#4706]({{ site.repository }}/issues/4706))
+- Bold-italicize note in assets documentation about needing front matter ([#4706]({{ site.repository }}/issues/4706))
 - Highlight the `script/` calls in the Contributing documentation ([#4712]({{ site.repository }}/issues/4712))
 - Add Hawkins to the list of third-party plugins ([#4755]({{ site.repository }}/issues/4755))
 - Fix a typo in pagination doc ([#4763]({{ site.repository }}/issues/4763))
@@ -1292,7 +2008,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Drop: fix hash setter precedence ([#4312]({{ site.repository }}/issues/4312))
 - utils: `has_yaml_header?` should accept files with extraneous spaces ([#4290]({{ site.repository }}/issues/4290))
 - Escape html from site.title and page.title in site template ([#4307]({{ site.repository }}/issues/4307))
-- Allow custom file extensions if defined in `permalink` YAML front matter ([#4314]({{ site.repository }}/issues/4314))
+- Allow custom file extensions if defined in `permalink` front matter ([#4314]({{ site.repository }}/issues/4314))
 - Fix deep_merge_hashes! handling of drops and hashes ([#4359]({{ site.repository }}/issues/4359))
 - Page should respect output extension of its permalink ([#4373]({{ site.repository }}/issues/4373))
 - Disable auto-regeneration when running server detached ([#4376]({{ site.repository }}/issues/4376))
@@ -1516,7 +2232,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Internal: trigger hooks by owner symbol ([#3871]({{ site.repository }}/issues/3871))
 - Update MIME types from mime-db ([#3933]({{ site.repository }}/issues/3933))
 - Add header to site template `_config.yml` for clarity & direction ([#3997]({{ site.repository }}/issues/3997))
-- Site template: add timezone offset to post date frontmatter ([#4001]({{ site.repository }}/issues/4001))
+- Site template: add timezone offset to post date front matter ([#4001]({{ site.repository }}/issues/4001))
 - Make a constant for the regex to find hidden files ([#4032]({{ site.repository }}/issues/4032))
 - Site template: refactor github & twitter icons into includes ([#4049]({{ site.repository }}/issues/4049))
 - Site template: add background to Kramdown Rouge-ified backtick code blocks ([#4053]({{ site.repository }}/issues/4053))
@@ -1534,7 +2250,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix nav items alignment when on multiple rows ([#3264]({{ site.repository }}/issues/3264))
 - Highlight: Only Strip Newlines/Carriage Returns, not Spaces ([#3278]({{ site.repository }}/issues/3278))
 - Find variables in front matter defaults by searching with relative file path. ([#2774]({{ site.repository }}/issues/2774))
-- Allow variables (e.g `:categories`) in YAML front matter permalinks ([#3320]({{ site.repository }}/issues/3320))
+- Allow variables (e.g `:categories`) in front matter permalinks ([#3320]({{ site.repository }}/issues/3320))
 - Handle nil URL placeholders in permalinks ([#3325]({{ site.repository }}/issues/3325))
 - Template: Fix nav items alignment when in "burger" mode ([#3329]({{ site.repository }}/issues/3329))
 - Template: Remove `!important` from nav SCSS introduced in [#3329]({{ site.repository }}/issues/3329) ([#3375]({{ site.repository }}/issues/3375))
@@ -1551,7 +2267,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Add WOFF2 font MIME type to Jekyll server MIME types ([#3647]({{ site.repository }}/issues/3647))
 - Be smarter about extracting the extname in `StaticFile` ([#3632]({{ site.repository }}/issues/3632))
 - Process metadata for all dependencies ([#3608]({{ site.repository }}/issues/3608))
-- Show error message if the YAML front matter on a page/post is invalid. ([#3643]({{ site.repository }}/issues/3643))
+- Show error message if the front matter on a page/post is invalid. ([#3643]({{ site.repository }}/issues/3643))
 - Upgrade redcarpet to 3.2 (Security fix: OSVDB-120415) ([#3652]({{ site.repository }}/issues/3652))
 - Create #mock_expects that goes directly to RSpec Mocks. ([#3658]({{ site.repository }}/issues/3658))
 - Open `.jekyll-metadata` in binary mode to read binary Marshal data ([#3713]({{ site.repository }}/issues/3713))
@@ -1631,7 +2347,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Add a Resources link to tutorial on building dynamic navbars ([#3185]({{ site.repository }}/issues/3185))
 - Semantic structure improvements to the post and page layouts ([#3251]({{ site.repository }}/issues/3251))
 - Add new AsciiDoc plugin to list of third-party plugins. ([#3277]({{ site.repository }}/issues/3277))
-- Specify that all transformable collection documents must contain YAML front matter ([#3271]({{ site.repository }}/issues/3271))
+- Specify that all transformable collection documents must contain front matter ([#3271]({{ site.repository }}/issues/3271))
 - Assorted accessibility fixes ([#3256]({{ site.repository }}/issues/3256))
 - Update configuration docs to mention `keep_files` for `destination` ([#3288]({{ site.repository }}/issues/3288), [#3296]({{ site.repository }}/issues/3296))
 - Break when we successfully generate nav link to save CPU cycles. ([#3291]({{ site.repository }}/issues/3291))
@@ -1659,7 +2375,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Add a link on all the docs pages to "Improve this page". ([#3510]({{ site.repository }}/issues/3510))
 - Add jekyll-auto-image generator to the list of third-party plugins ([#3489]({{ site.repository }}/issues/3489))
 - Replace link to the proposed `picture` element spec ([#3530]({{ site.repository }}/issues/3530))
-- Add frontmatter date formatting information ([#3469]({{ site.repository }}/issues/3469))
+- Add front matter date formatting information ([#3469]({{ site.repository }}/issues/3469))
 - Improve consistency and clarity of plugins options note ([#3546]({{ site.repository }}/issues/3546))
 - Add permalink warning to pagination docs ([#3551]({{ site.repository }}/issues/3551))
 - Fix grammar in Collections docs API stability warning ([#3560]({{ site.repository }}/issues/3560))
@@ -2231,7 +2947,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Clean up the `<head>` in the site template ([#2186]({{ site.repository }}/issues/2186))
 - Permit YAML blocks to end with three dots to better conform with the YAML spec ([#2110]({{ site.repository }}/issues/2110))
 - Use `File.exist?` instead of deprecated `File.exists?` ([#2214]({{ site.repository }}/issues/2214))
-- Require newline after start of YAML Front Matter header ([#2211]({{ site.repository }}/issues/2211))
+- Require newline after start of front matter header ([#2211]({{ site.repository }}/issues/2211))
 - Add the ability for pages to be marked as `published: false` ([#1492]({{ site.repository }}/issues/1492))
 - Add `Jekyll::LiquidExtensions` with `.lookup_variable` method for easy looking up of variable values in a Liquid context. ([#2253]({{ site.repository }}/issues/2253))
 - Remove literal lang name from class ([#2292]({{ site.repository }}/issues/2292))
@@ -2999,7 +3715,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Bullet-proof `limit_posts` option ([#1004]({{ site.repository }}/issues/1004))
 - Read in YAML as UTF-8 to accept non-ASCII chars ([#836]({{ site.repository }}/issues/836))
 - Fix the CLI option `--plugins` to actually accept dirs and files ([#993]({{ site.repository }}/issues/993))
-- Allow 'excerpt' in YAML front matter to override the extracted excerpt ([#946]({{ site.repository }}/issues/946))
+- Allow 'excerpt' in front matter to override the extracted excerpt ([#946]({{ site.repository }}/issues/946))
 - Fix cascade problem with site.baseurl, site.port and site.host. ([#935]({{ site.repository }}/issues/935))
 - Filter out directories with valid post names ([#875]({{ site.repository }}/issues/875))
 - Fix symlinked static files not being correctly built in unsafe mode ([#909]({{ site.repository }}/issues/909))
@@ -3011,7 +3727,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Patch for multibyte URI problem with `jekyll serve` ([#723]({{ site.repository }}/issues/723))
 - Order plugin execution by priority ([#864]({{ site.repository }}/issues/864))
 - Fixed Page#dir and Page#url for edge cases ([#536]({{ site.repository }}/issues/536))
-- Fix broken `post_url` with posts with a time in their YAML front matter ([#831]({{ site.repository }}/issues/831))
+- Fix broken `post_url` with posts with a time in their front matter ([#831]({{ site.repository }}/issues/831))
 - Look for plugins under the source directory ([#654]({{ site.repository }}/issues/654))
 - Tumblr Migrator: finds `_posts` dir correctly, fixes truncation of long post names ([#775]({{ site.repository }}/issues/775))
 - Force Categories to be Strings ([#767]({{ site.repository }}/issues/767))
@@ -3242,7 +3958,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 
 - Bug Fixes
 - Require redcloth >= 4.2.1 in tests ([#92]({{ site.repository }}/issues/92))
-- Don't break on triple dashes in yaml front matter ([#93]({{ site.repository }}/issues/93))
+- Don't break on triple dashes in front matter ([#93]({{ site.repository }}/issues/93))
 
 ### Minor Enhancements
 {: #minor-enhancements-v0-5-6}
@@ -3283,7 +3999,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Added --paginate option to the executable along with a paginator object for the payload (@calavera)
 - Upgraded RedCloth to 4.2.1, which makes `<notextile>` tags work once again.
 - Configuration options set in config.yml are now available through the site payload (@vilcans)
-- Posts can now have an empty YAML front matter or none at all (@ bahuvrihi)
+- Posts can now have an empty front matter or none at all (@ bahuvrihi)
 - Bug Fixes
 - Fixing Ruby 1.9 issue that requires `#to_s` on the err object (@Chrononaut)
 - Fixes for pagination and ordering posts on the same day (@ujh)
@@ -3291,7 +4007,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Index.html file should always have index.html permalink (@eugenebolshakov)
 - Added trailing slash to pretty permalink style so Apache is happy (@eugenebolshakov)
 - Bad markdown processor in config fails sooner and with better message (@ gcnovus)
-- Allow CRLFs in yaml front matter (@juretta)
+- Allow CRLFs in front matter (@juretta)
 - Added Date#xmlschema for Ruby versions < 1.9
 
 
@@ -3386,7 +4102,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Added post categories based on directories containing `_posts` (@mreid)
 - Added post topics based on directories underneath `_posts`
 - Added new date filter that shows the full month name (@mreid)
-- Merge Post's YAML front matter into its to_liquid payload (@remi)
+- Merge Post's front matter into its to_liquid payload (@remi)
 - Restrict includes to regular files underneath `_includes`
 - Bug Fixes
 - Change YAML delimiter matcher so as to not chew up 2nd level markdown headers (@mreid)

docs/_docs/includes.md

@@ -48,7 +48,9 @@ You could then reference that variable in your include:
 
 {% raw %}
 ```liquid
-{% include {{ page.my_variable }} %}
+{% if page.my_variable %}
+  {% include {{ page.my_variable }} %}
+{% endif %}
 ```
 {% endraw %}
 
@@ -67,7 +69,7 @@ You can also pass parameters to an include. For example, suppose you have a file
 ```
 {% endraw %}
 
-The `{% raw %}{{ include.content }}{% endraw %}` is a parameter that gets populated when you call the include and specify a value for that parameter, like this:
+The {% raw %}`{{ include.content }}`{% endraw %} is a parameter that gets populated when you call the include and specify a value for that parameter, like this:
 
 {% raw %}
 ```liquid
@@ -86,6 +88,7 @@ For example, suppose you have a special image syntax with complex formatting, an
    <a href="http://jekyllrb.com">
    <img src="logo.png" style="max-width: 200px;"
       alt="Jekyll logo" />
+   </a>
    <figcaption>This is the Jekyll logo</figcaption>
 </figure>
 ```
@@ -98,6 +101,7 @@ You could templatize this content in your include and make each value available
    <a href="{{ include.url }}">
    <img src="{{ include.file }}" style="max-width: {{ include.max-width }};"
       alt="{{ include.alt }}"/>
+   </a>
    <figcaption>{{ include.caption }}</figcaption>
 </figure>
 ```
@@ -125,7 +129,7 @@ The result is the original HTML code shown earlier.
 
 To safeguard situations where users don't supply a value for the parameter, you can use [Liquid's default filter](https://shopify.github.io/liquid/filters/default/).
 
-Overall, you can create includes that act as templates for a variety of uses &mdash; inserting audio or video clips, alerts, special formatting, and more. However, note that you should avoid using too many includes, as this will slow down the build time of your site. For example, don't use includes every time you insert an image. (The above technique shows a use case for special images.)
+Overall, you can create includes that act as templates for a variety of uses &mdash; inserting audio or video clips, alerts, special formatting, and more. Note that you should avoid using too many includes, as this will slow down the build time of your site. For example, don't use includes every time you insert an image. (The above technique shows a use case for special images.)
 
 ### Passing parameter variables to includes
 
@@ -150,41 +154,3 @@ Then pass this captured variable into the parameter for the include. Omit the qu
 {% include note.html content=download_note %}
 ```
 {% endraw %}
-
-### Passing references to YAML files as parameter values
-
-Instead of passing string variables to the include, you can pass a reference to a YAML data file stored in the `_data` folder.
-
-Here's an example. In the `_data` folder, suppose you have a YAML file called `profiles.yml`. Its content looks like this:
-
-```yaml
-- name: John Doe
-  login_age: old
-  image: johndoe.jpg
-
-- name: Jane Doe
-  login_age: new
-  image: janedoe.jpg
-```
-
-In the `_includes` folder, assume you have a file called `spotlight.html` with this code:
-
-{% raw %}
-```liquid
-{% for person in include.participants %}
-{% if person.login_age == "new" %}
-{{ person.name }}
-{% endif %}
-{% endfor %}
-```
-{% endraw %}
-
-Now when you insert the `spotlight.html` include file, you can submit the YAML file as a parameter:
-
-{% raw %}
-```liquid
-{% include spotlight.html participants=site.data.profiles %}
-```
-{% endraw %}
-
-In this instance, `site.data.profiles` gets inserted in place of {% raw %}`include.participants`{% endraw %} in the include file, and the Liquid logic processes. The result will be `Jane Doe`.

docs/_docs/index.md

@@ -1,41 +1,52 @@
 ---
-title: Welcome
-permalink: /docs/home/
-redirect_from: /docs/index.html
+title: Quickstart
+permalink: /docs/
+redirect_from:
+  - /docs/home/
+  - /docs/quickstart/
+  - /docs/extras/
 ---
+Jekyll is a static site generator. It takes text written in your
+favorite markup language and uses layouts to create a static website. You can
+tweak the site's look and feel, URLs, the data displayed on the page, and more. 
 
-This site aims to be a comprehensive guide to Jekyll. We’ll cover topics such as getting your site up and running, creating and managing content, customizing your build, and deploying.
+## Prerequisites
 
-## What is Jekyll, exactly?
+Jekyll requires the following:
 
-Jekyll is a simple, blog-aware, static site generator.
+* Ruby version **{{ site.data.ruby.min_version }}** or higher
+* RubyGems
+* GCC and Make
 
-You create your content as text files ([Markdown](https://daringfireball.net/projects/markdown/)), and organize them into folders. Then, you build the shell of your site using [Liquid](https://shopify.github.io/liquid/)-enhanced HTML templates. Jekyll automatically stitches the content and templates together, generating a website made entirely of static assets, suitable for uploading to any server.
+See [Requirements]({{ '/docs/installation/#requirements' | relative_url }}) for guides and details.
 
-Jekyll happens to be the engine behind [GitHub Pages](https://pages.github.com), so you can host your project’s Jekyll page/blog/website on GitHub’s servers **for free**.
+## Instructions
 
-## Navigating the Guide
+1. Install all [prerequisites]({{ '/docs/installation/' | relative_url }}).
+2. Install the jekyll and bundler [gems]({{ '/docs/ruby-101/#gems' | relative_url }}).
+```
+gem install jekyll bundler
+```
+3. Create a new Jekyll site at `./myblog`.
+```
+jekyll new myblog
+```
+4. Change into your new directory.
+```
+cd myblog
+```
+5. Build the site and make it available on a local server.
+```
+bundle exec jekyll serve
+```
+6. Browse to [http://localhost:4000](http://localhost:4000){:target="_blank"}
 
-Throughout this guide, you'll see these special sections that help you get the most out of Jekyll:
+{: .note .info}
+Pass the `--livereload` option to `serve` to automatically refresh the page with each change you make to the source files: `bundle exec jekyll serve --livereload`
 
-<div class="note">
-  <h5>ProTips™</h5>
-  <p>Tips and tricks that'll make you a Jekyll wizard!</p>
-</div>
 
-<div class="note info">
-  <h5>Notes</h5>
-  <p>Extra tidbits that are sometimes necessary to understand Jekyll.</p>
-</div>
+If you encounter any errors during this process, check that you have installed all the prerequisites in [Requirements]({{ '/docs/installation/#requirements' | relative_url }}). 
+If you still have issues, see [Troubleshooting]({{ '/docs/troubleshooting/#configuration-problems' | relative_url }}).
 
-<div class="note warning">
-  <h5>Warnings</h5>
-  <p>Common pitfalls to avoid.</p>
-</div>
-
-<div class="note unreleased">
-  <h5>Unreleased</h5>
-  <p>Features planned for future versions of Jekyll, but not available yet.</p>
-</div>
-
-If you find anything we haven’t covered, or would like to share a tip that others might find handy, please [file an issue]({{ site.repository }}/issues/new) and we’ll see about adding it to the guide.
+{: .note .info}
+Installation varies based on your operating system. See our [guides]({{ '/docs/installation/#guides' | relative_url }}) for OS-specific instructions.

docs/_docs/installation.md

@@ -4,199 +4,19 @@ description: Official guide to install Jekyll on macOS, GNU/Linux or Windows.
 permalink: /docs/installation/
 ---
 
-Jekyll is a [Ruby Gem](http://guides.rubygems.org/rubygems-basics/), and can be
-installed on most systems.
-
-- [Requirements](#requirements)
-- [Install Jekyll on macOS](#macOS)
-- [Install Jekyll on Ubuntu Linux](#ubuntu)
-- [Install Jekyll on Windows](../windows/)
-- [Upgrade Jekyll](#upgrade-jekyll)
+Jekyll is a [Ruby Gem]({{ '/docs/ruby-101/#gems' | relative_url }}) that can be installed on most systems.
 
 ## Requirements
 
-Before you start, make sure your system has the following:
+* [Ruby](https://www.ruby-lang.org/en/downloads/) version **{{ site.data.ruby.min_version }}** or higher, including all development headers (check your Ruby version using `ruby -v`)
+* [RubyGems](https://rubygems.org/pages/download) (check your Gems version using `gem -v`)
+* [GCC](https://gcc.gnu.org/install/) and [Make](https://www.gnu.org/software/make/) (check versions using `gcc -v`,`g++ -v`,  and `make -v`)
 
-- [Ruby](https://www.ruby-lang.org/en/downloads/) version 2.2.5 or above, including all development headers (ruby installation can be checked by running `ruby -v`)
-- [RubyGems](https://rubygems.org/pages/download) (which you can check by running `gem -v`)
-- [GCC](https://gcc.gnu.org/install/) and [Make](https://www.gnu.org/software/make/) (in case your system doesn't have them installed, which you can check by running `gcc -v`,`g++ -v`  and `make -v` in your system's command line interface)
+## Guides
 
-## Install on macOS {#macOS}
+For detailed install instructions, follow the guide for your operating system.
 
-We only cover macOS High Sierra 10.13 here, which comes with Ruby 2.3.3, older systems will need to [install a more recent Ruby version via Homebrew](#homebrew).
-
-First, you need to install the command-line tools to be able to compile native extensions, open a terminal and run:
-
-```sh
-xcode-select --install
-```
-
-### Set up Ruby included with the OS
-
-Check your Ruby version meet our requirements:
-
-```sh
-ruby -v
-2.3.3
-```
-
-Great, let's install Jekyll. We also need [Bundler](https://bundler.io/) to help us handle [plugins](../plugins) and [themes](../themes):
-
-```sh
-gem install bundler jekyll
-```
-
-That's it, you're ready to go, either by installing our [default minimal blog theme](https://github.com/jekyll/minima) with `jekyll new jekyll-website` or by starting from scratch:
-
-```sh
-mkdir jekyll-website
-cd jekyll-website
-
-# Create a Gemfile
-bundle init
-
-# Add Jekyll
-bundle add jekyll
-
-# Install gems
-bundle install
-```
-
-Great, from there you can now either use a [theme](../themes/) or [create your own layouts](../templates/).
-
-### Install a newer Ruby version via Homebrew {#homebrew}
-
-If you wish to install the latest version of Ruby and get faster builds, we recommend to do it via [Homebrew](https://brew.sh) a handy package manager for macOS.
-
-```sh
-/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
-brew install ruby
-ruby -v
-ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin17]
-```
-
-Yay! Now you have a shiny Ruby on your system!
-
-### Install multiple Ruby versions with rbenv {#rbenv}
-
-Developers often use [rbenv](https://github.com/rbenv/rbenv) to manage multiple Ruby versions. This can be useful if you want to run the same Ruby version used by [GitHub Pages](https://pages.github.com/versions/) or [Netlify](https://www.netlify.com/docs/#ruby) for instance.
-
-```sh
-# Install rbenv and ruby-build
-brew install rbenv
-
-# Setup rbenv integration to your shell
-rbenv init
-
-# Check your install
-curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-doctor | bash
-```
-
-Restart your terminal for changes to take effect.
-Now we can install the Ruby version of our choice, let's go with Ruby 2.5.1 here:
-
-```sh
-rbenv install 2.5.1
-rbenv global 2.5.1
-ruby -v
-ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin17]
-```
-
-That's it! Head over [rbenv command references](https://github.com/rbenv/rbenv#command-reference) to learn how to use different versions of Ruby in your projects.
-
-<div class="note info" markdown="1">
-
-##### Problems installing Jekyll?
-
-Check out the [troubleshooting](../troubleshooting/) page or
-[ask for help on our forum](https://talk.jekyllrb.com).
-
-</div>
-
-## Install on Ubuntu Linux {#ubuntu}
-
-Before we install Jekyll, we need to make sure we have all the required
-dependencies.
-
-```sh
-sudo apt-get install ruby ruby-dev build-essential
-```
-
-It is best to avoid installing Ruby Gems as the root user. Therefore, we need to
-set up a gem installation directory for your user account. The following
-commands will add environment variables to your `~/.bashrc` file to configure
-the gem installation path. Run them now:
-
-```sh
-echo '# Install Ruby Gems to ~/gems' >> ~/.bashrc
-echo 'export GEM_HOME=$HOME/gems' >> ~/.bashrc
-echo 'export PATH=$HOME/gems/bin:$PATH' >> ~/.bashrc
-source ~/.bashrc
-```
-
-Finally, install Jekyll:
-
-```sh
-gem install jekyll bundler
-```
-
-That's it! You're ready to start using Jekyll.
-
-## Upgrade Jekyll
-
-Before you start developing with Jekyll, you may want to check that you're up to date with the latest version. To find the currently installed version of Jekyll, run one of these commands:
-
-```sh
-jekyll --version
-gem list jekyll
-```
-
-You can use RubyGems to find [the current version of Jekyll](https://rubygems.org/gems/jekyll). Another way to check if you have the latest version is to run the command `gem outdated`. This will provide a list of all the gems on your system that need to be updated. If you aren't running the latest version, run this command:
-
-```sh
-bundle update jekyll
-```
-
-Alternatively, if you don't have Bundler installed run:
-
-```sh
-gem update jekyll
-```
-
-To upgrade to latest Rubygems, run:
-
-```
-gem update --system
-```
-
-Refer to our [upgrading section](../upgrading/) to upgrade from Jekyll 2.x or 1.x.
-
-## Pre-releases
-
-In order to install a pre-release, make sure you have all the requirements
-installed properly and run:
-
-```sh
-gem install jekyll --pre
-```
-
-This will install the latest pre-release. If you want a particular pre-release,
-use the `-v` switch to indicate the version you'd like to install:
-
-```sh
-gem install jekyll -v '2.0.0.alpha.1'
-```
-
-If you'd like to install a development version of Jekyll, the process is a bit
-more involved. This gives you the advantage of having the latest and greatest,
-but may be unstable.
-
-```sh
-git clone git://github.com/jekyll/jekyll.git
-cd jekyll
-script/bootstrap
-bundle exec rake build
-ls pkg/*.gem | head -n 1 | xargs gem install -l
-```
-
-Now that you’ve got everything up-to-date and installed, let’s get to work!
+* [macOS]({{ '/docs/installation/macos/' | relative_url }})
+* [Ubuntu]({{ '/docs/installation/ubuntu/' | relative_url }})
+* [Other Linux]({{ '/docs/installation/other-linux/' | relative_url }})
+* [Windows]({{ '/docs/installation/windows/' | relative_url }})

docs/_docs/installation/macos.md

@@ -0,0 +1,152 @@
+---
+title: Jekyll on macOS
+permalink: /docs/installation/macos/
+---
+
+## Install Command Line Tools
+To install the command line tools to compile native extensions, open a terminal and run:
+
+```sh
+xcode-select --install
+```
+
+## Install Ruby
+
+Jekyll requires **Ruby v{{ site.data.ruby.min_version }}** or higher.
+macOS Catalina 10.15 ships with Ruby 2.6.3. Check your Ruby version using `ruby -v`.
+
+If you're running a previous version of macOS, you'll have to install a newer version of Ruby.
+
+### With Homebrew {#brew}
+To run the latest Ruby version you need to install it through [Homebrew](https://brew.sh).
+
+```sh
+# Install Homebrew
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+
+# Install Ruby
+brew install ruby
+```
+
+Add the brew ruby path to your shell configuration:
+
+```bash
+# If you're using Zsh
+echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshrc
+
+# If you're using Bash
+echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.bash_profile
+
+# Unsure which shell you are using? Type
+echo $SHELL
+```
+
+Relaunch your terminal and check your Ruby setup:
+
+```sh
+which ruby
+# /usr/local/opt/ruby/bin/ruby
+
+ruby -v
+{{ site.data.ruby.current_version_output }}
+```
+
+You're now running the current stable version of Ruby!
+
+### With rbenv {#rbenv}
+
+People often use [rbenv](https://github.com/rbenv/rbenv) to manage multiple
+Ruby versions. This is very useful when you need to be able to run a given Ruby version on a project.
+
+```sh
+# Install Homebrew
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+
+# Install rbenv and ruby-build
+brew install rbenv
+
+# Set up rbenv integration with your shell
+rbenv init
+
+# Check your installation
+curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-doctor | bash
+```
+
+Restart your terminal to apply your changes.
+Next, you can install the Ruby version you want. Let's install the latest stable version:
+
+```sh
+rbenv install {{ site.data.ruby.current_version }}
+rbenv global {{ site.data.ruby.current_version }}
+ruby -v
+{{ site.data.ruby.current_version_output }}
+```
+
+That's it! Head over to [rbenv command references](https://github.com/rbenv/rbenv#command-reference) to learn how to use different versions of Ruby in your projects.
+
+## Install Jekyll
+
+After installing Ruby, install Jekyll and Bundler.
+
+### Local Install
+
+Install the bundler and jekyll gems:
+
+```sh
+gem install --user-install bundler jekyll
+```
+
+Get your Ruby version:
+
+```sh
+ruby -v
+{{ site.data.ruby.current_version_output }}
+```
+
+Append your path file with the following, replacing the `X.X` with the first two digits of your Ruby version:
+
+```bash
+# If you're using Zsh
+echo 'export PATH="$HOME/.gem/ruby/X.X.0/bin:$PATH"' >> ~/.zshrc
+
+# If you're using Bash
+echo 'export PATH="$HOME/.gem/ruby/X.X.0/bin:$PATH"' >> ~/.bash_profile
+
+# Unsure which shell you are using? Type
+echo $SHELL
+```
+
+Check that `GEM PATHS:` points to your home directory:
+
+```sh
+gem env
+```
+
+{: .note .info}
+Every time you update Ruby to a version in which the first two digits change, update your path to match.
+
+### Global Install
+
+{: .note .warning}
+We recommend not installing Ruby gems globally to avoid file permissions problems and using `sudo`.
+
+#### On Mojave (10.14)
+
+Because of SIP Protections in Mojave, run:
+
+```sh
+sudo gem install bundler
+sudo gem install -n /usr/local/bin/ jekyll
+```
+
+#### Before Mojave (<10.14)
+
+Run:
+
+```sh
+sudo gem install bundler jekyll
+```
+
+## Troubleshooting
+
+See [Troubleshooting]({{ '/docs/troubleshooting/' | relative_url }}) or [ask for help on our forum](https://talk.jekyllrb.com).

docs/_docs/installation/other-linux.md

@@ -0,0 +1,59 @@
+---
+title: Jekyll on Linux
+permalink: /docs/installation/other-linux/
+---
+
+Installation on other Linux distributions works similarly to installing on [Ubuntu](../ubuntu/).
+
+## Install prerequisites
+
+### Fedora
+
+```sh
+sudo dnf install ruby ruby-devel openssl-devel redhat-rpm-config @development-tools
+```
+### RHEL8/CentOS8
+
+```sh
+sudo dnf install ruby ruby-devel
+sudo dnf group install "Development Tools"
+```
+
+### Debian
+
+```sh
+sudo apt-get install ruby-full build-essential
+```
+
+### Gentoo
+
+```sh
+sudo emerge -av jekyll
+```
+
+or
+
+```sh
+sudo emerge --ask --verbose jekyll
+```
+
+### ArchLinux
+
+```sh
+sudo pacman -S ruby base-devel
+```
+
+### OpenSUSE
+
+```sh
+sudo zypper install -t pattern devel_ruby devel_C_C++
+```
+
+### Clear Linux
+
+```sh
+sudo swupd bundle-add ruby-basic
+```
+## Install Jekyll
+
+Follow the instructions for [Ubuntu](../ubuntu/).

docs/_docs/installation/ubuntu.md

@@ -0,0 +1,32 @@
+---
+title: Jekyll on Ubuntu
+permalink: /docs/installation/ubuntu/
+---
+
+## Install dependencies
+
+Install Ruby and other [prerequisites]({{ '/docs/installation/#requirements' | relative_url }}):
+
+```sh
+sudo apt-get install ruby-full build-essential zlib1g-dev
+```
+
+Avoid installing RubyGems packages (called gems) as the root user. Instead, 
+set up a gem installation directory for your user account. The following
+commands will add environment variables to your `~/.bashrc` file to configure
+the gem installation path:
+
+```sh
+echo '# Install Ruby Gems to ~/gems' >> ~/.bashrc
+echo 'export GEM_HOME="$HOME/gems"' >> ~/.bashrc
+echo 'export PATH="$HOME/gems/bin:$PATH"' >> ~/.bashrc
+source ~/.bashrc
+```
+
+Finally, install Jekyll and Bundler:
+
+```sh
+gem install jekyll bundler
+```
+
+That's it! You're ready to start using Jekyll.

docs/_docs/installation/windows.md

@@ -0,0 +1,152 @@
+---
+title: Jekyll on Windows
+permalink: /docs/installation/windows/
+redirect_from:
+  - /docs/windows/
+---
+
+While Windows is not an officially-supported platform, it can be used to run Jekyll with the proper tweaks.
+
+## Installing Ruby and Jekyll
+
+### Installation via RubyInstaller
+
+The easiest way to install Ruby and Jekyll is by using the [RubyInstaller](https://rubyinstaller.org/) for Windows.
+
+RubyInstaller is a self-contained Windows-based installer that includes the Ruby language, an execution environment,
+important documentation, and more.
+
+We only cover RubyInstaller-2.4 and newer here. Older versions need to
+[install the Devkit](https://github.com/oneclick/rubyinstaller/wiki/Development-Kit) manually.
+
+1. Download and install a **Ruby+Devkit** version from [RubyInstaller Downloads](https://rubyinstaller.org/downloads/).
+   Use default options for installation.
+2. Run the `ridk install` step on the last stage of the installation wizard. This is needed for installing gems with native
+   extensions. You can find additional information regarding this in the
+   [RubyInstaller Documentation](https://github.com/oneclick/rubyinstaller2#using-the-installer-on-a-target-system)
+3. Open a new command prompt window from the start menu, so that changes to the `PATH` environment variable becomes effective.
+   Install Jekyll and Bundler using `gem install jekyll bundler`
+4. Check if Jekyll has been installed properly: `jekyll -v`
+
+{: .note .info}
+You may receive an error when checking if Jekyll has been installed properly. Reboot your system and run `jekyll -v` again.
+If the error persists, please open a [RubyInstaller issue](https://github.com/oneclick/rubyinstaller2/issues/new).
+
+That's it, you're ready to use Jekyll!
+
+### Installation via Bash on Windows 10
+
+If you are using Windows 10 version 1607 or later, another option to run Jekyll is by
+[installing](https://msdn.microsoft.com/en-us/commandline/wsl/install_guide) the Windows Subsystem for Linux.
+
+{: .note .info}
+You must have [Windows Subsystem for Linux](https://msdn.microsoft.com/en-us/commandline/wsl/about) enabled.
+
+Make sure all your packages and repositories are up to date. Open a new Command Prompt or Powershell window and type `bash`.
+
+Your terminal should now be a Bash instance. Next, update your repository lists and packages:
+
+```sh
+sudo apt-get update -y && sudo apt-get upgrade -y
+```
+
+Next, install Ruby. To do this, let's use a repository from [BrightBox](https://www.brightbox.com/docs/ruby/ubuntu/),
+which hosts optimized versions of Ruby for Ubuntu.
+
+```sh
+sudo apt-add-repository ppa:brightbox/ruby-ng
+sudo apt-get update
+sudo apt-get install ruby2.5 ruby2.5-dev build-essential dh-autoreconf
+```
+
+Next, update your Ruby gems:
+
+```sh
+gem update
+```
+
+Install Jekyll:
+
+```sh
+gem install jekyll bundler
+```
+
+{: .note .info}
+  No `sudo` here.
+
+Check your Jekyll version:
+
+```sh
+jekyll -v
+```
+
+That's it! You're ready to start using Jekyll. 
+
+You can make sure time management is working properly by inspecting your `_posts` folder. You should see a markdown file
+with the current date in the filename.
+
+<div class="note info">
+  <h5>Non-superuser account issues</h5>
+  <p>If the `jekyll new` command prints the error "Your user account isn't allowed to install to the system RubyGems", see
+  the "Running Jekyll as Non-Superuser" instructions in
+  <a href="{{ '/docs/troubleshooting/#no-sudo' | relative_url }}">Troubleshooting</a>.</p>
+</div>
+
+{: .note .info}
+Bash on Ubuntu on Windows is still under development, so you may run into issues.
+
+## Encoding
+
+If you use UTF-8 encoding, make sure that no `BOM` header characters exist in your files. If they don't, Jekyll will break. This is especially relevant when you're running Jekyll on Windows.
+
+Additionally, you might need to change the code page of the console window to UTF-8 in case you get a
+`Liquid Exception: Incompatible character encoding` error during the site generation process. Run the following:
+
+```sh
+chcp 65001
+```
+
+## Time Zone Management
+
+Since Windows doesn't have a native source of zoneinfo data, the Ruby Interpreter doesn't understand IANA Timezones.
+Using them had the `TZ` environment variable default to UTC/GMT 00:00.
+
+Though Windows users could alternatively define their blog's timezone by setting the key to use the POSIX format of defining
+timezones, it wasn't as user-friendly when it came to having the clock altered to changing DST-rules.
+
+Jekyll now uses a rubygem to internally configure Timezone based on established
+[IANA Timezone Database](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
+
+While 'new' blogs created with Jekyll v3.4 and greater, will have the following added to their `Gemfile` by default, existing
+sites *will* have to update their `Gemfile` (and installed gems) to enable development on Windows:
+
+```ruby
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+```
+
+<div class="note warning">
+  <h5>TZInfo 2.0 incompatibility</h5>
+  <p>
+    Version 2.0 of the TZInfo library has introduced a change in how timezone offsets are calculated.
+    This will result in incorrect date and time for your posts when the site is built with Jekyll 3.x on Windows.
+  </p>
+  <p>
+    We therefore recommend that you lock the Timezone library to version 1.2 and above by listing
+    <code>gem 'tzinfo', '~> 1.2'</code> in your <code>Gemfile</code>.
+  </p>
+</div>
+
+## Auto Regeneration
+
+Jekyll uses the `listen` gem to watch for changes when the `--watch` switch is specified during a build or serve.
+While `listen` has built-in support for UNIX systems, it may require an extra gem for compatibility with Windows.
+
+Add the following to the `Gemfile` for your site if you have issues with auto-regeneration on Windows alone:
+
+```ruby
+gem 'wdm', '~> 0.1.1', :install_if => Gem.win_platform?
+```
+
+You have to use a [Ruby+Devkit](https://rubyinstaller.org/downloads/) version of the RubyInstaller and install
+the MSYS2 build tools to successfully install the `wdm` gem.

docs/_docs/layouts.md

@@ -0,0 +1,141 @@
+---
+title: Layouts
+description: placeholder
+permalink: /docs/layouts/
+---
+Layouts are templates that wrap around your content. They allow you to have the
+source code for your template in one place so you don't have to repeat things
+like your navigation and footer on every page.
+
+Layouts live in the `_layouts` directory. The convention is to have a base
+template called `default.html` and have other layouts [inherit](#inheritance)
+from this as needed.
+
+<div class="note">
+  <h5>Layouts Directory</h5>
+  <p>
+    Jekyll looks for the <code>_layouts</code> directory either at the root of
+    your site's <code>source</code> or at the root of your theme.
+  </p>
+  <p>
+    While you can configure the directory name in which your layouts can reside by
+    setting the <code>layouts_dir</code> key in your config file, the directory
+    itself should be located at the root of your site's <code>source</code> directory.
+  </p>
+</div>
+
+## Usage
+
+The first step is to put the template source code in `default.html`. `content`
+is a special variable, the value is the rendered content of the post or page
+being wrapped.
+
+{% raw %}
+```liquid
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>{{ page.title }}</title>
+    <link rel="stylesheet" href="/css/style.css">
+  </head>
+  <body>
+    <nav>
+      <a href="/">Home</a>
+      <a href="/blog/">Blog</a>
+    </nav>
+    <h1>{{ page.title }}</h1>
+    <section>
+      {{ content }}
+    </section>
+    <footer>
+      &copy; to me
+    </footer>
+  </body>
+</html>
+```
+{% endraw %}
+
+You have full access to the front matter of the origin. In the
+example above, `page.title` comes from the page front matter.
+
+Next you need to specify what layout you're using in your page's front matter.
+You can also use
+[front matter defaults](/docs/configuration/front-matter-defaults/) to save you
+from having to set this on every page.
+
+```markdown
+---
+title: My First Page
+layout: default
+---
+
+This is the content of my page
+```
+
+The rendered output of this page is:
+
+```html
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>My First Page</title>
+    <link rel="stylesheet" href="/css/style.css">
+  </head>
+  <body>
+    <nav>
+      <a href="/">Home</a>
+      <a href="/blog/">Blog</a>
+    </nav>
+    <h1>My First Page</h1>
+    <section>
+      This is the content of my page
+    </section>
+    <footer>
+      &copy; to me
+    </footer>
+  </body>
+</html>
+```
+
+## Inheritance
+
+Layout inheritance is useful when you want to add something to an existing
+layout for a portion of documents on your site. A common example of this is
+blog posts, you might want a post to display the date and author but otherwise
+be identical to your base layout.
+
+To achieve this you need to create another layout which specifies your original
+layout in front matter. For example this layout will live at
+`_layouts/post.html`:
+
+{% raw %}
+```liquid
+---
+layout: default
+---
+<p>{{ page.date }} - Written by {{ page.author }}</p>
+
+{{ content }}
+```
+{% endraw %}
+
+Now posts can use this layout while the rest of the pages use the default.
+
+## Variables
+
+You can set front matter in layouts, the only difference is when you're
+using in Liquid, you need to use the `layout` variable instead of `page`. For
+example:
+
+{% raw %}
+```liquid
+---
+city: San Francisco
+---
+<p>{{ layout.city }}</p>
+
+{{ content }}
+```
+{% endraw %}

docs/_docs/liquid.md

@@ -0,0 +1,19 @@
+---
+title: Liquid
+permalink: /docs/liquid/
+redirect_from: "/docs/templates/"
+---
+
+Jekyll uses the [Liquid](https://shopify.github.io/liquid/) templating language
+to process templates.
+
+Generally in Liquid you output content using two curly braces e.g.
+{% raw %}`{{ variable }}`{% endraw %} and perform logic statements by
+surrounding them in a curly brace percentage sign e.g.
+{% raw %}`{% if statement %}`{% endraw %}. To learn more about Liquid, check
+out the [official Liquid Documentation](https://shopify.github.io/liquid/).
+
+Jekyll provides a number of useful Liquid additions to help you build your site:
+
+* [Filters]({{ '/docs/liquid/filters/' | relative_url }})
+* [Tags]({{ '/docs/liquid/tags/' | relative_url }})

docs/_docs/liquid/filters.md

@@ -0,0 +1,154 @@
+---
+title: Liquid Filters
+permalink: "/docs/liquid/filters/"
+shopify_filter_url: https://shopify.github.io/liquid/filters/
+shopify_filters:
+- abs
+- append
+- at_least
+- at_most
+- capitalize
+- ceil
+- compact
+- concat
+- date
+- default
+- divided_by
+- downcase
+- escape
+- escape_once
+- first
+- floor
+- join
+- last
+- lstrip
+- map
+- minus
+- modulo
+- newline_to_br
+- plus
+- prepend
+- remove
+- remove_first
+- replace
+- replace_first
+- reverse
+- round
+- rstrip
+- size
+- slice
+- sort
+- sort_natural
+- split
+- strip
+- strip_html
+- strip_newlines
+- times
+- truncate
+- truncatewords
+- uniq
+- upcase
+- url_decode
+- url_encode
+---
+
+All of the standard Liquid [filters](#standard-liquid-filters) are supported (see below).
+
+To make common tasks easier, Jekyll even adds a few handy filters of its own,
+all of which you can find on this page. You can also create your own filters
+using [plugins](/docs/plugins/).
+
+<div class="mobile-side-scroller">
+<table>
+  <thead>
+    <tr>
+      <th>Description</th>
+      <th><span class="filter">Filter</span> and <span class="output">Output</span></th>
+    </tr>
+  </thead>
+  <tbody>
+    {% for filter in site.data.jekyll_filters %}
+      <tr>
+        <td>
+          <p id="{{ filter.name | slugify }}" class="name"><strong>{{ filter.name }}</strong></p>
+          <p>
+            {{- filter.description -}}
+            {%- if filter.version_badge %}
+              <span class="version-badge" title="This filter is available from version {{ filter.version_badge }}">
+                {{- filter.version_badge -}}
+              </span>
+            {% endif -%}
+          </p>
+        </td>
+        <td class="align-center">
+          {%- for example in filter.examples %}
+            <p><code class="filter">{{ example.input }}</code></p>
+            {% if example.output %}<p><code class="output">{{ example.output }}</code></p>{% endif %}
+          {% endfor -%}
+        </td>
+      </tr>
+    {% endfor %}
+  </tbody>
+</table>
+</div>
+
+### Options for the `slugify` filter
+
+The `slugify` filter accepts an option, each specifying what to filter.
+The default is `default`. They are as follows (with what they filter):
+
+- `none`: no characters
+- `raw`: spaces
+- `default`: spaces and non-alphanumeric characters
+- `pretty`: spaces and non-alphanumeric characters except for `._~!$&'()+,;=@`
+- `ascii`: spaces, non-alphanumeric, and non-ASCII characters
+- `latin`: like `default`, except Latin characters are first transliterated (e.g. `àèïòü` to `aeiou`) {%- include docs_version_badge.html version="3.7.0" -%}.
+
+### Detecting `nil` values with `where` filter {%- include docs_version_badge.html version="4.0" -%}
+
+You can use the `where` filter to detect documents and pages with properties that are `nil` or `""`. For example,
+
+{% raw %}
+```liquid
+// Using `nil` to select posts that either do not have `my_prop`
+// defined or `my_prop` has been set to `nil` explicitly.
+{% assign filtered_posts = site.posts | where: 'my_prop', nil %}
+```
+{% endraw %}
+
+{% raw %}
+```liquid
+// Using Liquid's special literal `empty` or `blank` to select
+// posts that have `my_prop` set to an empty value.
+{% assign filtered_posts = site.posts | where: 'my_prop', empty %}
+```
+{% endraw %}
+
+### Binary operators in `where_exp` filter {%- include docs_version_badge.html version="4.0" -%}
+
+You can use Liquid binary operators `or` and `and` in the expression passed to the `where_exp` filter to employ multiple
+conditionals in the operation.
+
+For example, to get a list of documents on English horror flicks, one could use the following snippet:
+
+{% raw %}
+```liquid
+{{ site.movies | where_exp: "item", "item.genre == 'horror' and item.language == 'English'" }}
+```
+{% endraw %}
+
+Or to get a list of comic-book based movies, one may use the following:
+
+{% raw %}
+```liquid
+{{ site.movies | where_exp: "item", "item.sub_genre == 'MCU' or item.sub_genre == 'DCEU'" }}
+```
+{% endraw %}
+
+### Standard Liquid Filters
+
+For your convenience, here is the list of all [Liquid filters]({{ page.shopify_filter_url }}) with links to examples in the official Liquid documentation.
+
+{% for filter in page.shopify_filters %}
+- [{{ filter }}]({{ filter | prepend: page.shopify_filter_url | append: '/' }})
+{% endfor %}

docs/_docs/liquid/tags.md

@@ -0,0 +1,170 @@
+---
+title: Tags Filters
+permalink: "/docs/liquid/tags/"
+---
+All of the standard Liquid
+[tags](https://shopify.github.io/liquid/tags/control-flow/) are supported.
+Jekyll has a few built in tags to help you build your site. You can also create
+your own tags using [plugins]({{ '/docs/plugins/' | relative_url }}).
+
+## Includes
+
+If you have page snippets that you use repeatedly across your site, an
+[include]({{ '/docs/includes/' | relative_url }}) is the perfect way to make this more maintainable.
+
+## Code snippet highlighting
+
+Jekyll has built in support for syntax highlighting of over 100 languages
+thanks to [Rouge](http://rouge.jneen.net). Rouge is the default highlighter
+in Jekyll 3 and above.
+
+{: .note .warning}
+Using Pygments has been deprecated and is not supported in
+Jekyll 4; the configuration setting <code>highlighter: pygments</code>
+now automatically falls back to using <em>Rouge</em> which is written in Ruby
+and 100% compatible with stylesheets for Pygments.
+
+To render a code block with syntax highlighting, surround your code as follows:
+
+{% raw %}
+```liquid
+{% highlight ruby %}
+def foo
+  puts 'foo'
+end
+{% endhighlight %}
+```
+{% endraw %}
+
+The argument to the `highlight` tag (`ruby` in the example above) is the
+language identifier. To find the appropriate identifier to use for the language
+you want to highlight, look for the “short name” on the [Rouge
+wiki](https://github.com/jayferd/rouge/wiki/List-of-supported-languages-and-lexers).
+
+<div class="note">
+  <h5>Jekyll processes all Liquid filters in code blocks</h5>
+  <p>If you are using a language that contains curly braces, you
+    will likely need to place <code>{&#37; raw &#37;}</code> and
+    <code>{&#37; endraw &#37;}</code> tags around your code.
+    Since Jekyll {% include docs_version_badge.html version="4.0" %}, you can add <code>render_with_liquid: false</code> in your front matter to disable Liquid entirely for a particular document.</p>
+</div>
+
+### Line numbers
+
+There is a second argument to `highlight` called `linenos` that is optional.
+Including the `linenos` argument will force the highlighted code to include line
+numbers. For instance, the following code block would include line numbers next
+to each line:
+
+{% raw %}
+```liquid
+{% highlight ruby linenos %}
+def foo
+  puts 'foo'
+end
+{% endhighlight %}
+```
+{% endraw %}
+
+### Stylesheets for syntax highlighting
+
+In order for the highlighting to show up, you’ll need to include a highlighting
+stylesheet. For Pygments or Rouge you can use a stylesheet for Pygments, you
+can find an example gallery
+[here](https://jwarby.github.io/jekyll-pygments-themes/languages/ruby.html)
+or from [its repository](https://github.com/jwarby/jekyll-pygments-themes).
+
+Copy the CSS file (`native.css` for example) into your css directory and import
+the syntax highlighter styles into your `main.css`:
+
+```css
+@import "native.css";
+```
+
+## Links
+
+{: .note}
+Since Jekyll {% include docs_version_badge.html version="4.0"%}, you don't need to prepend `link` and `post_url` tags with `site.baseurl`.
+
+### Linking to pages {#link}
+
+To link to a post, a page, collection item, or file, the `link` tag will generate the correct permalink URL for the path you specify. For example, if you use the `link` tag to link to `mypage.html`, even if you change your permalink style to include the file extension or omit it, the URL formed by the `link` tag will always be valid.
+
+You must include the file's original extension when using the `link` tag. Here are some examples:
+
+{% raw %}
+```liquid
+{% link _collection/name-of-document.md %}
+{% link _posts/2016-07-26-name-of-post.md %}
+{% link news/index.html %}
+{% link /assets/files/doc.pdf %}
+```
+{% endraw %}
+
+You can also use the `link` tag to create a link in Markdown as follows:
+
+{% raw %}
+```liquid
+[Link to a document]({% link _collection/name-of-document.md %})
+[Link to a post]({% link _posts/2016-07-26-name-of-post.md %})
+[Link to a page]({% link news/index.html %})
+[Link to a file]({% link /assets/files/doc.pdf %})
+```
+{% endraw %}
+
+The path to the post, page, or collection is defined as the path relative to the root directory (where your config file is) to the file, not the path from your existing page to the other page.
+
+For example, suppose you're creating a link in `page_a.md` (stored in `pages/folder1/folder2`) to `page_b.md` (stored in  `pages/folder1`). Your path in the link would not be `../page_b.html`. Instead, it would be `/pages/folder1/page_b.md`.
+
+If you're unsure of the path, add {% raw %}`{{ page.path }}`{% endraw %} to the page and it will display the path.
+
+One major benefit of using the `link` or `post_url` tag is link validation. If the link doesn't exist, Jekyll won't build your site. This is a good thing, as it will alert you to a broken link so you can fix it (rather than allowing you to build and deploy a site with broken links).
+
+Note you cannot add filters to `link` tags. For example, you cannot append a string using Liquid filters, such as {% raw %}`{% link mypage.html | append: "#section1" %}`{% endraw %}. To link to sections on a page, you will need to use regular HTML or Markdown linking techniques.
+
+The name of the file you want to link can be specified as a variable instead of an actual file name. For example, suppose you defined a variable in your page's front matter like this:
+
+```yaml
+---
+title: My page
+my_variable: footer_company_a.html
+---
+```
+
+You could then reference that variable in your link:
+
+{% raw %}
+```liquid
+{% link {{ page.my_variable }} %}
+```
+{% endraw %}
+
+In this example, the `link` tag would render a link to the file `footer_company_a.html`.
+
+### Linking to posts
+
+If you want to include a link to a post on your site, the `post_url` tag will generate the correct permalink URL for the post you specify.
+
+{% raw %}
+```liquid
+{% post_url 2010-07-21-name-of-post %}
+```
+{% endraw %}
+
+If you organize your posts in subdirectories, you need to include subdirectory path to the post:
+
+{% raw %}
+```liquid
+{% post_url /subdir/2010-07-21-name-of-post %}
+```
+{% endraw %}
+
+There is no need to include the file extension when using the `post_url` tag.
+
+You can also use this tag to create a link to a post in Markdown as follows:
+
+{% raw %}
+```liquid
+[Name of Link]({% post_url 2010-07-21-name-of-post %})
+```
+{% endraw %}

docs/_docs/maintaining/affinity-team-captain.md

@@ -3,7 +3,7 @@ title: Affinity Team Captains
 ---
 
 **This guide is for affinity team captains.** These special people are **team maintainers** of one of our [affinity teams][] and help triage and evaluate the issues and contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 ## Affinity teams & their captains
 
@@ -17,11 +17,11 @@ Each affinity team has a few captains who manage the issues and pull requests fo
 
 Just ask! Feel free to open an issue on `jekyll/jekyll` and add `/cc @jekyll/core`. We can add you. :smile:
 
-Alternatively, you can email or otherwise reach out to [@parkr](https://github.com/parkr) directly if you prefer the more private route.
+Alternatively, you can email or otherwise reach out to [@oe](https://github.com/oe) directly if you prefer the more private route.
 
 ## Ugh, I'm tired and don't have time to be a captain anymore. What now?
 
-No sweat at all! Email [@parkr](https://github.com/parkr) and ask to be removed. Alternatively, you should be able to go to your team's page on GitHub.com (go to https://github.com/jekyll, click "Teams", click the link to your team) and change your status to either "member" or leave the team.
+No sweat at all! Email [@oe](https://github.com/oe) and ask to be removed. Alternatively, you should be able to go to your team's page on GitHub.com (go to https://github.com/jekyll, click "Teams", click the link to your team) and change your status to either "member" or leave the team.
 
 We realize that being a captain is no easy feat so we want to make it a great experience. As always, communicate as much as you can with us about what is working, and what isn't. Thanks for dedicating some time to Jekyll! :sparkles:
 

docs/_docs/maintaining/avoiding-burnout.md

@@ -3,7 +3,7 @@ title: "Avoiding Burnout"
 ---
 
 **This guide is for maintainers.** These special people have **write access** to one or more of Jekyll's repositories and help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 # 1. Use Jekyll
 

docs/_docs/maintaining/becoming-a-maintainer.md

@@ -3,7 +3,7 @@ title: "Becoming a Maintainer"
 ---
 
 **This guide is for contributors.** These special people have contributed to one or more of Jekyll's repositories, but do not yet have write access to any. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 So you want to become a maintainer of a Jekyll project? We'd love to have you! Here are some things we like to see from community members before we promote them to maintainers.
 

docs/_docs/maintaining/index.md

@@ -4,7 +4,7 @@ permalink: /docs/maintaining/
 ---
 
 **This guide is for Jekyll contributors and maintainers.** These special people contribute to one or more of Jekyll's repositories or help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 Hello! This is where we document various processes for maintaining Jekyll. Being a maintainer for any Jekyll project is a big responsibility, so we put together some helpful documentation for various tasks you might do as a maintainer.
 

docs/_docs/maintaining/merging-a-pull-request.md

@@ -3,11 +3,11 @@ title: "Merging a Pull Request"
 ---
 
 **This guide is for maintainers.** These special people have **write access** to one or more of Jekyll's repositories and help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 ## Code Review
 
-All pull requests should be subject to code review. Code review is a [foundational value](https://blog.fullstory.com/what-we-learned-from-google-code-reviews-arent-just-for-catching-bugs-b125a13aa292) of good engineering teams. Besides providing validation of correctness, it promotes a sense of community and gives other maintainers understanding of all parts of the code base. In short, code review is crucial to a healthy open source project.
+All pull requests should be subject to code review. Code review is a [foundational value](https://blog.fullstory.com/what-we-learned-from-google-code-reviews-arent-just-for-catching-bugs/) of good engineering teams. Besides providing validation of correctness, it promotes a sense of community and gives other maintainers understanding of all parts of the code base. In short, code review is crucial to a healthy open source project.
 
 **Read our guide for [Reviewing a pull request](../reviewing-a-pull-request) before merging.** Notably, the change must have tests if for code, and at least two maintainers must give it an OK.
 
@@ -20,7 +20,7 @@ We have [a helpful little bot](https://github.com/jekyllbot) which we use to mer
 
 To merge a pull request, leave a comment thanking the contributor, then add the special merge request:
 
-```text
+```
 Thank you very much for your contribution. Folks like you make this project and community strong. :heart:
 
 @jekyllbot: merge +dev

docs/_docs/maintaining/releasing-a-new-version.md

@@ -3,7 +3,7 @@ title: "Releasing a new version"
 ---
 
 **This guide is for maintainers.** These special people have **write access** to one or more of Jekyll's repositories and help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 The most important thing to understand before making a release is that there's no need to feel nervous. Most things are revertable, and even if you do publish an incomplete gem version, we can always skip that one. Don't hestitate to contact the other maintainers if you feel unsure or don't know what to do next.
 

docs/_docs/maintaining/reviewing-a-pull-request.md

@@ -3,7 +3,7 @@ title: "Reviewing a Pull Request"
 ---
 
 **This guide is for maintainers.** These special people have **write access** to one or more of Jekyll's repositories and help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 ## Respond Kindly
 

docs/_docs/maintaining/special-labels.md

@@ -3,7 +3,7 @@ title: "Special Labels"
 ---
 
 **This guide is for maintainers.** These special people have **write access** to one or more of Jekyll's repositories and help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 We use a series of "special labels" on GitHub.com to automate handling of some parts of the pull request and issue process. @jekyllbot may automatically apply or remove certain labels based on actions taken by users or maintainers. Below are the labels and how they work:
 

docs/_docs/maintaining/triaging-an-issue.md

@@ -3,7 +3,7 @@ title: "Triaging an Issue"
 ---
 
 **This guide is for maintainers.** These special people have **write access** to one or more of Jekyll's repositories and help merge the contributions of others. You may find what is written here interesting, but it’s definitely not for everyone.
-{: .note .info }
+{: .note .info}
 
 Before evaluating an issue, it is important to identify if it is a feature
 request or a bug. For the Jekyll project the following definitions are used
@@ -51,4 +51,4 @@ Is what they wanted to get something we want to happen? Sometimes a bug report i
 
 ### Staleness and automatic closure
 
-@jekyllbot will automatically mark issues as `stale` if no activity occurs for at least one month. @jekyllbot leaves a comment asking for information about reproducibility in current versions. If no one responds after another month, the issue is automatically closed. This behaviour can be suppressed by setting the [`pinned` label](../maintaining/special-labels.md/#pinned).
+@jekyllbot will automatically mark issues as `stale` if no activity occurs for at least one month. @jekyllbot leaves a comment asking for information about reproducibility in current versions. If no one responds after another month, the issue is automatically closed. This behavior can be suppressed by setting the [`pinned` label](/docs/maintaining/special-labels/#pinned).

docs/_docs/markdown-101.md

@@ -0,0 +1,6 @@
+---
+title: Markdown 101
+permalink: /docs/markdown-101/
+---
+
+# TO WRITE